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1201.

If the origin is shifted to the point (2, 3), the coordinates of a point become (5, -4). Find the original coordinates, when the axes are parallel.

Answer»

If the origin is shifted to the point (2, 3), the coordinates of a point become (5, -4). Find the original coordinates, when the axes are parallel.

1202.

Two cards are drawn from the standard deck of 52 playing cards without replacement. Find the probability of getting first card as queen and second as an ace.

Answer»

Two cards are drawn from the standard deck of 52 playing cards without replacement. Find the probability of getting first card as queen and second as an ace.

1203.

Let f:[2,3]→B be a function defined by f(x)=[log2[x2+2x−1]], where [.] represents the greatest integer function. If range of f is B, then

Answer»

Let f:[2,3]B be a function defined by f(x)=[log2[x2+2x1]], where [.] represents the greatest integer function. If range of f is B, then


1204.

Integrate the following w.r.t x:12x+3

Answer»

Integrate the following w.r.t x:12x+3


1205.

If a matrix A=[aij]2×2 is formed, whose aij is either 0,1 or 2 and a11a22+a12a21=0, then the number of such different matrices is

Answer»

If a matrix A=[aij]2×2 is formed, whose aij is either 0,1 or 2 and a11a22+a12a21=0, then the number of such different matrices is

1206.

If A={x:|x|≤5;x∈Z−{0}}, B={x:x≤100;x∈W} and f:A→B is a function defined by f(x)=x2+1, then the number of elements in the range of f that lie in [5,26) is

Answer»

If A={x:|x|5;xZ{0}}, B={x:x100;xW} and f:AB is a function defined by f(x)=x2+1, then the number of elements in the range of f that lie in [5,26) is

1207.

The ratio in which the join of A(2,1,5) and B(3,4,3) is divided by the plane x+2y−z=0 is:

Answer»

The ratio in which the join of A(2,1,5) and B(3,4,3) is divided by the plane x+2yz=0 is:

1208.

The number of lines drawn through 6 points lying on a circle, is

Answer» The number of lines drawn through 6 points lying on a circle, is
1209.

ABCD is a quadrilateral. E is the point of intersection of the line joining the midpoint of the opposite sides. If O is any point and −−→OA+−−→OB+−−→OC+−−→OD=x−−→OE, then x is equal to

Answer» ABCD is a quadrilateral. E is the point of intersection of the line joining the midpoint of the opposite sides. If O is any point and OA+OB+OC+OD=xOE, then x is equal to
1210.

If a cos 2θ+b sin 2θ=c has α and β as its solution, then the value of tan α+tan β is

Answer»

If a cos 2θ+b sin 2θ=c has α and β

as its solution, then the value of tan α+tan β is

1211.

Find the equation of the circle which passes through the centre of the circle x2+y2+8x+10y−7=0 and is concentric with the circle 2x2+2y2−8x−12y−9=0.

Answer»

Find the equation of the circle which passes through the centre of the circle x2+y2+8x+10y7=0 and is concentric with the circle 2x2+2y28x12y9=0.

1212.

How many words, with or without meaning can be formed from the letters of the word 'MONDAY' assuming that no letter is repeated? If (i) 4 letters are used at a time? (ii) all letters are used at a time ? (iii) all letters are used but first letter is vowel? Or How many different words can be formed by using all the letters of the word 'ALLAHABAD' ? (i) In how many of them, vowels occupy the even position ? (ii) In how many of them, both 'L' do not come together ?

Answer»

How many words, with or without meaning can be formed from the letters of the word 'MONDAY' assuming that no letter is repeated? If

(i) 4 letters are used at a time?

(ii) all letters are used at a time ?

(iii) all letters are used but first letter is vowel?

Or

How many different words can be formed by using all the letters of the word 'ALLAHABAD' ?

(i) In how many of them, vowels occupy the even position ?

(ii) In how many of them, both 'L' do not come together ?

1213.

Question 4For any positive integer n, prove that n3–n is divisible by 6.

Answer» Question 4

For any positive integer n, prove that n3n is divisible by 6.
1214.

If p and q are the perpendicular distances from the origin to the straight lines x secθ−y cosecθ=α and x cosθ+y sinθ=αcos 2θ then

Answer»

If p and q are the perpendicular distances from the origin to the straight lines x secθy cosecθ=α and x cosθ+y sinθ=αcos 2θ then



1215.

Let a>2 be an integer. If there are just 18 positive integers satisfying the inequality (x−a)(x−2a)(x−a2)<0, then the value of a is

Answer» Let a>2 be an integer. If there are just 18 positive integers satisfying the inequality (xa)(x2a)(xa2)<0, then the value of a is
1216.

If acos3α+3acosαsin2α = m and asin3α+3acos2αsinα = n, Then (m+n)23+(m−n)23 is equal to

Answer»

If acos3α+3acosαsin2α = m and

asin3α+3acos2αsinα = n, Then (m+n)23+(mn)23

is equal to


1217.

The value of the integral ∫2−2 (1−x2∣∣ dx is

Answer» The value of the integral 22 (1x2 dx is
1218.

If the thrid term in the binomial expansion of (1+x)m is - 18x2, then the rational value of m is

Answer»

If the thrid term in the binomial expansion of (1+x)m is - 18x2, then the rational value of m is


1219.

Define a relation R on the set N of natural number by R= {(x,y):y=x+5,x is a natural number less than 4;x,y ϵ N}. Depict this relationship using roster form. Write down the domain and the range.

Answer» Define a relation R on the set N of natural number by R= {(x,y):y=x+5,x is a natural number less than 4;x,y ϵ N}. Depict this relationship using roster form. Write down the domain and the range.
1220.

The greatest integer less than or equal to (√3+1)6 is

Answer»

The greatest integer less than or equal to (3+1)6 is


1221.

Which of the following can be the parametric equation of x2 = 4ay

Answer»

Which of the following can be the parametric equation of x2 = 4ay


1222.

Two fair dice are rolled simultaneously. One of the dice shows four. The probability of other dice showing six, is equal to

Answer»

Two fair dice are rolled simultaneously. One of the dice shows four. The probability of other dice showing six, is equal to

1223.

The Young’s modulus of steel is twice as that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of

Answer»

The Young’s modulus of steel is twice as that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of

1224.

Find the value of sin 13x + sin x if cos 12x = cos 14 x ___

Answer»

Find the value of sin 13x + sin x if cos 12x = cos 14 x


___
1225.

A line through the point A(2, 0), which makes an angle of 30∘ with the positive direction of x-axis is rotated about A in clockwise direction through an angle 15∘. The equation of the straight line in the new position is

Answer»

A line through the point A(2, 0), which makes an angle of 30 with the positive direction of x-axis is rotated about A in clockwise direction through an angle 15. The equation of the straight line in the new position is


1226.

If an+bnan−1+bn−1 is the A.M. between a and b, then find the value of n.

Answer» If an+bnan1+bn1 is the A.M. between a and b, then find the value of n.
1227.

Suppose a,b ϵ R and a≠ 0,b≠0. Let α,β be the roots of x2+ax+b=0 . Find the equation whose roots are α2, β2.

Answer»

Suppose a,b ϵ R and a 0,b0. Let α,β be the roots of x2+ax+b=0 . Find the equation whose roots are α2, β2.


1228.

In how many ways can 19 identical books on English and 17 identical books on Hindi be placed in a row on a shelf so that two books on Hindi may not be together ?

Answer»

In how many ways can 19 identical books on English and 17 identical books on Hindi be placed in a row on a shelf so that two books on Hindi may not be together ?

1229.

Negation of the compound statement ‘if the examination is difficult, then I shall pass if I study hard’ is ___.

Answer»

Negation of the compound statement ‘if the examination is difficult, then I shall pass if I study hard’ is ___.



1230.

Let the series be 121+12+221+2+12+22+321+2+3+…. Then(where Tn and Sn denote the nth term and sum upto nth term respectively.)

Answer»

Let the series be 121+12+221+2+12+22+321+2+3+. Then



(where Tn and Sn denote the nth term and sum upto nth term respectively.)

1231.

The value of k for which the points (2,-3), (k,-1) and (0,4) are collinear, is .

Answer»

The value of k for which the points (2,-3), (k,-1) and (0,4) are collinear, is .

1232.

The functionf(x)=∫x−1 t(et−1)(t−1)(t−2)3(t−3)5 dt has a local minimum at x=

Answer»

The function

f(x)=x1 t(et1)(t1)(t2)3(t3)5 dt has a local minimum at x=

1233.

For non-negative real numbers h1, h2, h3, k1, k2, k3, if the algebraic sum of the perpendiculars drawn from the points (2,k1), (3,k2), (7,k3), (h1,4), (h2,5), (h3,−3) on a variable line passing through (2,1) is zero, then

Answer»

For non-negative real numbers h1, h2, h3, k1, k2, k3, if the algebraic sum of the perpendiculars drawn from the points (2,k1), (3,k2), (7,k3), (h1,4), (h2,5), (h3,3) on a variable line passing through (2,1) is zero, then

1234.

The differential equation corresponding to primitive y=edx isorThe elimination of the arbitrary constant m from the equation y=emx gives the differential equation [MP PET 1995, 2000; Pb. CET 2000]

Answer»

The differential equation corresponding to primitive y=edx is


or


The elimination of the arbitrary constant m from the equation y=emx gives the differential equation


[MP PET 1995, 2000; Pb. CET 2000]



1235.

Let α &amp; β be the roots of \({x^2}\) – 6x – 2= 0 which α &gt;β . if an= αn –βn for n≥1 , then the value of a10−2a82a9 is

Answer»

Let α & β be the roots of \({x^2}\) – 6x – 2= 0 which α >β . if an= αnβn for n1 , then the

value of a102a82a9 is


1236.

√−8−6i=

Answer»

86i=


1237.

Find the derivative of the following function (it is to be understood that a, b, c, d are fixed non-zero constants): f(x)= (ax+b)(cx+d)2

Answer» Find the derivative of the following function (it is to be understood that a, b, c, d are fixed non-zero constants):
f(x)= (ax+b)(cx+d)2

1238.

The equation x2+y2−12x−8y+27=0 is equivalent to

Answer»

The equation x2+y212x8y+27=0 is equivalent to

1239.

If f(x)=tan(√x−2+√4−x), then the range of f(x) is

Answer»

If f(x)=tan(x2+4x), then the range of f(x) is

1240.

Let →b and →c be two non-collinear vectors. If →a is a vector such that →a⋅(→b+→c)=4 and a×(→b×→c)=(x2−2x+6)→b+(siny)→c, then (x,y) lies on the line

Answer»

Let b and c be two non-collinear vectors. If a is a vector such that a(b+c)=4 and a×(b×c)=(x22x+6)b+(siny)c, then (x,y) lies on the line

1241.

IQ of a person is given by the gormula IQ=MACA×100 where MA is mental age and CA is chronological age. If 80≤IQ≤140 for a group of 12 years old childern, find the range of their mental age.

Answer»

IQ of a person is given by the gormula IQ=MACA×100 where MA is mental age and CA is chronological age. If 80IQ140 for a group of 12 years old childern, find the range of their mental age.

1242.

The sum of coefficients of integral powers of x in the binomial expansion (1−2√x)50 is

Answer»

The sum of coefficients of integral powers of x in the binomial expansion (12x)50 is


1243.

Write the component statements of the statement. Also, check whether the statement is correct or not. 'If x and y are integers, then xy is a rational number.

Answer» Write the component statements of the statement. Also, check whether the statement is correct or not.
'If x and y are integers, then xy is a rational number.
1244.

A four digit number is formed using the digits 0, 1, 2, 3, 4 without repetition. Find the probability that it is divisible by 4.

Answer»

A four digit number is formed using the digits 0, 1, 2, 3, 4 without repetition. Find the probability that it is divisible by 4.


1245.

1 is a root of the equation x2 + px + q = 0 find the other root

Answer»

1 is a root of the equation x2 + px + q = 0 find the other root


1246.

Find the limits :i. limx→1(x3−x2+1)ii. limx→3[x(x+1)]iii. limx→−1(1+x+x2+...+x10)

Answer» Find the limits :

i. limx1(x3x2+1)

ii. limx3[x(x+1)]

iii. limx1(1+x+x2+...+x10)
1247.

Consider the system of linear equations in x, y and z ; (sin 3θ) x - y + z = 0 ......(i) (cos 2θ)x + 4y + 3z = 0 ......(ii) 2x + 7y+ 7z = 0 ......(iii) The value of θ for which the system has nontrivial solution is

Answer»

Consider the system of linear equations in x, y and z ;
(sin 3θ) x - y + z = 0 ......(i)
(cos 2θ)x + 4y + 3z = 0 ......(ii)
2x + 7y+ 7z = 0 ......(iii)

The value of θ for which the system has nontrivial solution is


1248.

A scientist is weighing each of 30 fishes. Their mean weight worked out is 30 gm and a standard deviaiton of 2 gm. Later, it was found that the measuring scale was misaligned and always under-reported every fish weight by 2gm. The correct mean and standard deviation (in gm) of fishes are respectively:

Answer»

A scientist is weighing each of 30 fishes. Their mean weight worked out is 30 gm and a standard deviaiton of 2 gm. Later, it was found that the measuring scale was misaligned and always under-reported every fish weight by 2gm. The correct mean and standard deviation (in gm) of fishes are respectively:


1249.

If tan2x+sec x−a=0 has alteast one solution, then a∈ ___

Answer»

If tan2x+sec xa=0 has alteast one solution, then a ___


1250.

Let n(U) = 700, n(A) = 200, n(B) = 300 and n(A ∩ B) = 100, Then n(Ac ∩ Bc =

Answer»

Let n(U) = 700, n(A) = 200, n(B) = 300 and n(A ∩ B) = 100,

Then n(AcBc =