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7801.

30 members of a club decided to play a badminton singles tournament .Every time a member loses a game ,he is out of the tournament.What is the minimum number and maximum number of matches to be played to decide the winner ?

Answer» 30 members of a club decided to play a badminton singles tournament .Every time a member loses a game ,he is out of the tournament.What is the minimum number and maximum number of matches to be played to decide the winner ?
7802.

Let n≥2 be a natural number and 0<θ<π2.Then ∫(sinnθ−sinθ)1ncosθsinn+1θdθ is equal to : (where C is constant of integration)

Answer»

Let n2 be a natural number and 0<θ<π2.

Then (sinnθsinθ)1ncosθsinn+1θdθ is equal to :

(where C is constant of integration)

7803.

∫x−sin x1+cos xdx=x tan(x2)+p log∣∣sec(x2)∣∣+c⇒p=

Answer»

xsin x1+cos xdx=x tan(x2)+p logsec(x2)+cp=



7804.

If f(x ^ 2) = 4x ^ 6 + 3x ^ 4 , then f(5) is equal to

Answer» If f(x ^ 2) = 4x ^ 6 + 3x ^ 4 , then f(5) is equal to
7805.

If I=x∫0[cost]dt, where x∈[(4n+1)π2,(4n+3)π2],n∈N and [⋅] represents greatest integer function, then the value of I is

Answer»

If I=x0[cost]dt, where x[(4n+1)π2,(4n+3)π2],nN and [] represents greatest integer function, then the value of I is

7806.

If f(x)=(x+1)(x4+x3+2)(x3+4x2+2x+3), then dydx∣∣∣x=−1 is

Answer»

If f(x)=(x+1)(x4+x3+2)(x3+4x2+2x+3), then dydxx=1 is

7807.

Type of terms and corresponding number is written in Column 2 and Column 3 respectively of the Binomial in Column 1. Column I Column II Column 3(I)(516+719)1824(i)Total number of rational terms(P)4(II)(516+218)100(ii)Total number of irrational terms(Q)102(III)(314+413)99(iii)12[Total number of termsNumber of rational terms],(R)224 where [.]represents greatest integer function. (IV)(713+1119)2007(iv)Total number of terms(S)Is divisible by 13 Select the correct combination

Answer» Type of terms and corresponding number is written in Column 2 and Column 3 respectively of the Binomial in Column 1.
Column I Column II Column 3(I)(516+719)1824(i)Total number of rational terms(P)4(II)(516+218)100(ii)Total number of irrational terms(Q)102(III)(314+413)99(iii)12[Total number of termsNumber of rational terms],(R)224 where [.]represents greatest integer function. (IV)(713+1119)2007(iv)Total number of terms(S)Is divisible by 13
Select the correct combination
7808.

The product of slope of tangents from point (0,1) to the circle x2+y2−2x+4y=0 is

Answer»

The product of slope of tangents from point (0,1) to the circle x2+y22x+4y=0 is

7809.

If |z1|=1,|z2|=2,|z3|=3 and |z1+2z2+3z3|=6, then the value of 16|z2z3+8z1z3+27z1z2| is equal to

Answer» If |z1|=1,|z2|=2,|z3|=3 and |z1+2z2+3z3|=6, then the value of 16|z2z3+8z1z3+27z1z2| is equal to
7810.

The point of intersection of the tangents of the circle x2+y2=10, drawn at end points of the chord x + y = 2 is

Answer»

The point of intersection of the tangents of the circle x2+y2=10, drawn at end points of the chord x + y = 2 is



7811.

If [t] denotes the greatest integer ≤t, then the value of π/8∫0[secx+2[tanx+3[cosx+4[sinx]]]]dx is

Answer»

If [t] denotes the greatest integer t, then the value of π/80[secx+2[tanx+3[cosx+4[sinx]]]]dx is

7812.

The locus of a point which divides the join of A(-1, 1) and a variable point P on the circle x2+y2=4 in the ratio 3:2, is

Answer»

The locus of a point which divides the join of A(-1, 1) and a variable point P on the circle x2+y2=4 in the ratio 3:2, is


7813.

Find the coordinates of the point where the line through (3, -4, -5) and (2, -3, 1) crosses the planes 2x + y + z = 7

Answer»

Find the coordinates of the point where the line through (3, -4, -5) and (2, -3, 1) crosses the planes 2x + y + z = 7

7814.

Area bounded by the curve y=1 and y=sinx+cosx+|sinx−cosx|2 in x∈[0,π] is aπ−√b−c, (where a,b,c are integers) then a+b+c is

Answer» Area bounded by the curve y=1 and y=sinx+cosx+|sinxcosx|2 in x[0,π] is aπbc, (where a,b,c are integers) then a+b+c is
7815.

The equation of the parabola whose focus is (4,−3) and vertex is (4,−1)

Answer»

The equation of the parabola whose focus is (4,3) and vertex is (4,1)

7816.

Using integration find the area of the region bounded by the curves y=4-x2, x2+y2-4x=0 and the x-axis.

Answer» Using integration find the area of the region bounded by the curves y=4-x2, x2+y2-4x=0 and the x-axis.
7817.

The area of the smaller region lying above the x-axis and included between the circle x2 + y2 = 2x and the parabola y2 = x.

Answer»

The area of the smaller region lying above the x-axis and included between the circle x2 + y2 = 2x and the parabola y2 = x.


7818.

A steel beam of breadth 120 mm and height 750 mm is loaded as shown in the figure. Assume Esteel=200 Gpa.The beam is subjected to a maximum bending moment of

Answer»

A steel beam of breadth 120 mm and height 750 mm is loaded as shown in the figure. Assume Esteel=200 Gpa.

The beam is subjected to a maximum bending moment of


7819.

If one of the diameters of the curve x2+y2−4x−6y+9=0 is a chord of a circle with centre (1,1), the radius of this circle is

Answer»

If one of the diameters of the curve x2+y24x6y+9=0 is a chord of a circle with centre (1,1), the radius of this circle is

7820.

a²x-b²y=a²-2b²b²x+a²y=b²+2a²

Answer» a²x-b²y=a²-2b²
b²x+a²y=b²+2a²
7821.

If P(A)=611,P(B)=511 and P(A∪B)=711, then the value of P(A/B) is:

Answer»

If P(A)=611,P(B)=511 and P(AB)=711, then the value of P(A/B) is:

7822.

If sin x=35, tan y=12 and π2&lt;x&lt;π&lt;y&lt;3π2, find the value of 8 tan x-5 sec y.

Answer» If sin x=35, tan y=12 and π2<x<π<y<3π2, find the value of 8 tan x-5 sec y.
7823.

f(x) = x is called

Answer»

f(x) = x is called


7824.

Find the minimum distance between } the curves }y^2=4x and }x^2+y^2-12x+31=0 . } solve it by parametric form of equation of normal of a parabola

Answer» Find the minimum distance between } the curves }y^2=4x and }x^2+y^2-12x+31=0 . } solve it by parametric form of equation of normal of a parabola
7825.

three digit numbers are formed such that the sum of the numbers is also a three digit number and in no place addition is going on if the number of such numbers is of the form 36lambda^2.then find the value of lambda

Answer» three digit numbers are formed such that the sum of the numbers is also a three digit number and in no place addition is going on if the number of such numbers is of the form 36lambda^2.then find the value of lambda
7826.

In the following table, a ratio is given in each column. Find the remaining two ratios in the column and complete the table. sin θ 1161 12 35 cos θ 3537 13 tan θ 1 2120 815 122

Answer»
In the following table, a ratio is given in each column. Find the remaining two ratios in the column and complete the table.









































sin θ

1161


12


35
cos θ 3537 13
tan θ 1 2120

815


122

7827.

2 dy + y tan x cos x

Answer» 2 dy + y tan x cos x
7828.

Interval of alpha for which (alpha,alpha^2) and (0,0) lies on same side of 3x+y-10=0 is

Answer» Interval of alpha for which (alpha,alpha^2) and (0,0) lies on same side of 3x+y-10=0 is
7829.

If x+(1/x)=7, then what will be the value of x^3+(1/x^3)?

Answer» If x+(1/x)=7, then what will be the value of x^3+(1/x^3)?
7830.

Explain: Shifting of origin, coordinates of the point dividing a line segment externally

Answer» Explain: Shifting of origin, coordinates of the point dividing a line segment externally
7831.

If an integer p is chosen at random in the interval 0≤p≤5, the probability that the roots of the equation x2+px+p4+12=0 are real is:

Answer»

If an integer p is chosen at random in the interval 0p5, the probability that the roots of the equation x2+px+p4+12=0 are real is:



7832.

Suppose f and g are differentiable functions on (0,∞) such that f'(x)=−g(x)x and g'(x)=−f(x)x, for all x&gt;0. Further, f(1)=3 and g(1)=−1.g(110) is equal to

Answer»

Suppose f and g are differentiable functions on (0,) such that f'(x)=g(x)x and g'(x)=f(x)x, for all x>0. Further, f(1)=3 and g(1)=1.



g(110) is equal to

7833.

(a,b) is the mid point of the chord ¯AB of the circle x2+y2=r2. The tangent at A,B meet a C. then area of ΔABC

Answer»

(a,b) is the mid point of the chord ¯AB of the circle x2+y2=r2. The tangent at A,B meet a C. then area of ΔABC


7834.

If the equation of the plane passing through the line of intersection of the planes 2x−7y+4z−3=0,3x−5y+4z+11=0 and the point (−2,1,3) is ax+by+cz−7=0, then the value of 2a+b+c−7 is

Answer» If the equation of the plane passing through the line of intersection of the planes 2x7y+4z3=0,3x5y+4z+11=0 and the point (2,1,3) is ax+by+cz7=0, then the value of 2a+b+c7 is
7835.

Find the equation of straight line that passes through the point (1, 2) and perpendicular to the line 4x + 5y + 3 = 0.

Answer»

Find the equation of straight line that passes through the point (1, 2) and perpendicular to the line 4x + 5y + 3 = 0.


7836.

The number of all possible matrices of order 3 × 3 with each entry 0 or 1 is: (A) 27 (B) 18 (C) 81 (D) 512

Answer»

The
number of all possible matrices of order 3
×
3 with each entry 0 or 1 is:



(A) 27



(B) 18



(C) 81



(D) 512

7837.

Prove that: tan−1[√1+x−√1−x√1+x+√1−x]=π4−12cos−1x,−1√2≤x≤1

Answer» Prove that: tan1[1+x1x1+x+1x]=π412cos1x,12x1



7838.

If log2x+log2y≥6, then the least value of xy is

Answer»

If log2x+log2y6, then the least value of xy is

7839.

Find the values of k for which the roots are real and equal in each of the following equations:(i) kx2+4x+1=0(ii) kx2-25x+4=0(iii) 3x2-5x+2k=0(iv) 4x2+kx+9=0(v) 2kx2-40x+25=0(vi) 9x2-24x+k=0(vii) 4x2-3kx+1=0(viii) x2-25+2kx+37+10k=0(ix) 3k+1x2+2k+1x+k=0(x) kx2+kx+1=-4x2-x(xi) k+1x2+2k+3x+k+8=0(xii) x2-2kx+7k-12=0(xiii) k+1x2-23k+1x+8k+1=0(xiv) 2k+1x2+2k+3x+k+5=0(xvii) 4x2-2k+1x+k+4=0(xviii) 4x2-2k+1x+k+1=0

Answer» Find the values of k for which the roots are real and equal in each of the following equations:



(i) kx2+4x+1=0

(ii) kx2-25x+4=0

(iii) 3x2-5x+2k=0

(iv) 4x2+kx+9=0

(v) 2kx2-40x+25=0

(vi) 9x2-24x+k=0

(vii) 4x2-3kx+1=0

(viii) x2-25+2kx+37+10k=0

(ix) 3k+1x2+2k+1x+k=0

(x) kx2+kx+1=-4x2-x

(xi) k+1x2+2k+3x+k+8=0

(xii) x2-2kx+7k-12=0

(xiii) k+1x2-23k+1x+8k+1=0

(xiv) 2k+1x2+2k+3x+k+5=0

(xvii) 4x2-2k+1x+k+4=0

(xviii) 4x2-2k+1x+k+1=0
7840.

Find the equation for the ellipse that satisfies the given conditions: Vertices (0, ±13), foci (0, ±5)

Answer»

Find the equation for the ellipse that satisfies the given conditions: Vertices (0, ±13), foci (0, ±5)

7841.

If f:R→R and g:R→R are given by f(x) = |x| and g(x) = [x], then g(f(x))≤f(g(x) is true for -

Answer»

If f:RR and g:RR are given by f(x) = |x| and g(x) = [x], then g(f(x))f(g(x) is true for -

7842.

limx→0ax−a−xx

Answer»

limx0axaxx

7843.

If D E F are the midpoints of the triangle ABC are (x1,y1) ( x2,y2) and (x3,y3) then find the coordinates of its vertices.

Answer» If D E F are the midpoints of the triangle ABC are (x1,y1) ( x2,y2) and (x3,y3) then find the coordinates of its vertices.
7844.

If α and β (α&gt;β) are the roots of the equation x2−√2x+√3−2√2=0, then the value of (cos−1α+tan−1α+tan−1β) is equal to

Answer»

If α and β (α>β) are the roots of the equation x22x+322=0, then the value of (cos1α+tan1α+tan1β) is equal to

7845.

If y=y(x), y∈[0,π2) is the solution of the differential equation secydydx−sin(x+y)−sin(x−y)=0 with y(0)=0, then 5y′(π2) is equal to

Answer» If y=y(x), y[0,π2) is the solution of the differential equation secydydxsin(x+y)sin(xy)=0 with y(0)=0, then 5y(π2) is equal to
7846.

If A is an invertible matrix of order 3 and A = 3, then adj A = ___________________.

Answer» If A is an invertible matrix of order 3 and A = 3, then adj A = ___________________.
7847.

If 3+14(3+P)+142(3+2P)+143(3+3P)+…=8, then the value of P is

Answer»

If 3+14(3+P)+142(3+2P)+143(3+3P)+=8, then the value of P is

7848.

limx→1 logexx-1 is equal to __________________.

Answer» limx1 logexx-1 is equal to __________________.
7849.

What is the probability of not getting purple in the spinner?

Answer»

What is the probability of not getting purple in the spinner?




7850.

Which of the following functions is decreasing in 0,π2?(a) sin 2x (b) tan x (c) cos x (d) cos 3x

Answer» Which of the following functions is decreasing in 0,π2?

(a) sin 2x (b) tan x (c) cos x (d) cos 3x