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3101.

Find the equation of the ellipse, with major axis along the X-axis and passing through the points (4,3) and (-1,4) Or Find the equation of the circle pasing through the points (-3, 4), (-2, 0) and (1,5)) find the coordinates of the centre and radius of the circle.

Answer»

Find the equation of the ellipse, with major axis along the X-axis and passing through the points (4,3) and (-1,4)

Or

Find the equation of the circle pasing through the points (-3, 4), (-2, 0) and (1,5)) find the coordinates of the centre and radius of the circle.

3102.

If the sides of a right-angled triangle are in AP then what are the sines of the acute angles?

Answer» If the sides of a right-angled triangle are in AP then what are the sines of the acute angles?
3103.

If the equations x2+2x+3=0 and ax2+bx+c=0,a,b,c∈R, have a common root, then a:b:c is

Answer»

If the equations x2+2x+3=0 and ax2+bx+c=0,a,b,cR, have a common root, then a:b:c is

3104.

Evaluate the given limit :limx→3x4−812x2−5x−3

Answer» Evaluate the given limit :

limx3x4812x25x3
3105.

The solution(s) of the equation (3|x|−3)2=|x|+7 which belong to the domain of √x(x−3) is/are

Answer»

The solution(s) of the equation (3|x|3)2=|x|+7 which belong to the domain of x(x3) is/are

3106.

In a triangle ABC, a = 3, b = 5, c = 7. Find the angle opposite to C.

Answer»

In a triangle ABC, a = 3, b = 5, c = 7. Find the angle opposite to C.



3107.

(As per Gay lussac law) Graph of PT vs T^2, P/T vs T & P/T vs P.

Answer» (As per Gay lussac law)
Graph of PT vs T^2, P/T vs T & P/T vs P.
3108.

If tanA=13 and secB=135 where π<A<3π2, 3π2<B<2π, then cot(A+B) is equal to

Answer»

If tanA=13 and secB=135 where π<A<3π2, 3π2<B<2π, then cot(A+B) is equal to

3109.

The condition for 2 sets A and B to be disjoint is

Answer»

The condition for 2 sets A and B to be disjoint is



3110.

In a certain city only two newspapers A and B are published, it is known that 25% of the city population reads A and 20% reads B, while 8% reads both A and B. It is also known that 30% of those who read A but not B look into advertisements and 40% of those who read B but not A look into advertisements while 50% of those who read both A and B look into advertisements. If a person is chosen at random from the population, what is the percentage probability that he/she reads advertisements?

Answer»

In a certain city only two newspapers A and B are published, it is known that 25% of the city population reads A and 20% reads B, while 8% reads both A and B. It is also known that 30% of those who read A but not B look into advertisements and 40% of those who read B but not A look into advertisements while 50% of those who read both A and B look into advertisements. If a person is chosen at random from the population, what is the percentage probability that he/she reads advertisements?

3111.

In a group of 70 people, 37 like coffee, 52 like tea and each person like atleast one of the two drinks. The number of persons liking both coffee and tea is

Answer»

In a group of 70 people, 37 like coffee, 52 like tea and each person like atleast one of the two drinks. The number of persons liking both coffee and tea is

3112.

Let S1 = nC0 + nC1 + nC2.............nCn and S2 = nC0 - nC1 + nC2 ..............+ (−1)n nCnFind the value of S1S1+S2 is ___.

Answer»

Let S1 = nC0 + nC1 + nC2.............nCn and S2 = nC0 - nC1 + nC2 ..............+ (1)n nCn



Find the value of S1S1+S2 is ___.



3113.

The origin of the co-ordinate axes is shifted to (-1,3) and the axes is rotated through an angle of 90∘ in anti-clockwise direction. If (a,b) is the new coordinates of (2,3) in the new coordinate system, then find the value of 2a2+3b2__

Answer»

The origin of the co-ordinate axes is shifted to (-1,3) and the axes is rotated through an angle of 90 in anti-clockwise direction. If (a,b) is the new coordinates of (2,3) in the new coordinate system, then find the value of 2a2+3b2



__
3114.

The value of a for which the point (a, 2a) lies in the interior region of the parabola y2=16xis .

Answer» The value of a for which the point (a, 2a) lies in the interior region of the parabola y2=16xis

.
3115.

Find the set of values of λ for which the line 3x−4y+λ=0 intersects the ellipse x216+y2a=1 at 2 distinct point.

Answer»

Find the set of values of λ for which the
line 3x4y+λ=0 intersects the ellipse
x216+y2a=1 at 2 distinct point.


3116.

The number of ways in which a volleyball team of 6 can be selected out of 10 players so that 2 particular players are always included, is

Answer»

The number of ways in which a volleyball team of 6 can be selected out of 10 players so that 2 particular players are always included, is

3117.

Sum of the common roots of z2006+z100+1=0and z3+2z2+2z+1=0 is

Answer»

Sum of the common roots of z2006+z100+1=0

and z3+2z2+2z+1=0 is



3118.

If a set A is a subset of another set B, then , which means

Answer»

If a set A is a subset of another set B, then , which means

3119.

If ω is imaginary cube root of unity, then arg(i ω) + arg(i ω2) =

Answer»

If ω is imaginary cube root of unity, then arg(i ω) + arg(i ω2) =


3120.

The locus of the middle points of chords of hyperbola 3x2−2y2+4x−6y=0 parallel to y=2x is :

Answer»

The locus of the middle points of chords of hyperbola 3x22y2+4x6y=0 parallel to y=2x is :

3121.

If cos (A-B) = 35 and tanAtanB = 2,then

Answer»

If cos (A-B) = 35 and tanAtanB = 2,then


3122.

The value of the integral ∫0πcos(π−x) will be equal to the value of which of the following integral.

Answer» The value of the integral 0πcos(πx) will be equal to the value of which of the following integral.
3123.

A spiral is made up of successive semicircles, with centres alternately at A and B, starting with centre at A. If the radii are in sequence, 0.5 cm,1.0 cm,1.5 cm,2.0 cm,… as shown in figure below.Then the total length of the spiral made by thirteen consecutive semicircles is(Take π=227)

Answer»

A spiral is made up of successive semicircles, with centres alternately at A and B, starting with centre at A. If the radii are in sequence, 0.5 cm,1.0 cm,1.5 cm,2.0 cm, as shown in figure below.





Then the total length of the spiral made by thirteen consecutive semicircles is

(Take π=227)

3124.

The coefficients of three consecutive terms of (1+x)n+5 are in the ratio 5:10:14. Then n=

Answer» The coefficients of three consecutive terms of (1+x)n+5 are in the ratio 5:10:14. Then n=
3125.

(1+cosϕ+isinϕ1+cosϕ−isinϕ)n =

Answer»

(1+cosϕ+isinϕ1+cosϕisinϕ)n =


3126.

The value of is equal to

Answer»

The value of is equal to



3127.

The equation x2−3xy+λy2+3x−5y+2=0 When λ is a real number, represents a pair of straight lines.If θ is the angle between the lines, then cosec2θ= [EAMCET 1992]

Answer»

The equation x23xy+λy2+3x5y+2=0 When λ is a real number, represents a pair of straight lines.If θ is the angle between the lines, then cosec2θ= [EAMCET 1992]


3128.

The angle between the lines represented by the equation ax2+xy+by2=0 will be 45∘, if

Answer»

The angle between the lines represented by the equation ax2+xy+by2=0 will be 45, if


3129.

limx→0(tanxx)1/x2 is equal to

Answer» limx0(tanxx)1/x2 is equal to
3130.

Find the sum of the series 131+13+231+3+13+23+331+3+5+−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−12terms __

Answer»

Find the sum of the series 131+13+231+3+13+23+331+3+5+12terms


__
3131.

A, B, C, D are four trees, located at the vertices of a square. Wind blows from A to B with uniform speed. The ratio of times of flight of a bird from A to B and from B to A is 'n'. At what angle should the bird fly from the direction of wind flow, in order that it starts from A and reaches C.Let

Answer»

A, B, C, D are four trees, located at the vertices of a square. Wind blows from A to B with uniform speed. The ratio of times of flight of a bird from A to B and from B to A is 'n'. At what angle should the bird fly from the direction of wind flow, in order that it starts from A and reaches C.Let


3132.

Which of the following options has (have) the correct combination of the function and its graph?

Answer»

Which of the following options has (have) the correct combination of the function and its graph?


3133.

limx→0x5[1x3] where [.] denotes the greatest integer function.

Answer»

limx0x5[1x3] where [.] denotes the greatest integer function.


3134.

Let f(x)=x−[x]1+x−[x],x ϵ R, where [ x] denotes the greatest integer function. Then, the range of f is

Answer»

Let f(x)=x[x]1+x[x],x ϵ R, where [ x] denotes the greatest integer function. Then, the range of f is


3135.

Two sets A and B have p and q elements respectively. Then the number of relations from B to A is

Answer»

Two sets A and B have p and q elements respectively. Then the number of relations from B to A is

3136.

An n-digit number is a positive number with exactly n digits. Nine hundred distinct n-digit numbers are to be formed using only the three digits 2, 5 and 7. The smallest value of n for which this is possible is

Answer»

An n-digit number is a positive number with exactly n digits. Nine hundred distinct n-digit numbers are to be formed using only the three digits 2, 5 and 7. The smallest value of n for which this is possible is


3137.

6th term in expansion of (2x2−13x2)10 is

Answer»

6th term in expansion of (2x213x2)10 is


3138.

There are four unknown numbers. The mean of the first two numbers is 4 and the mean of the first three is 9. The mean of all four numbers is 15, if one of the four numbers is 2, find the other 3 numbers

Answer» There are four unknown numbers. The mean of the first two numbers is 4 and the mean of the first three is 9. The mean of all four numbers is 15, if one of the four numbers is 2, find the other 3 numbers
3139.

Let f(θ)=sinθ(sinθ+sin3θ), then f(θ) is

Answer»

Let f(θ)=sinθ(sinθ+sin3θ), then f(θ) is

3140.

Which of the following numbers has the positive value?

Answer»

Which of the following numbers has the positive value?

3141.

10(2n−1)+1 is divisible by

Answer»

10(2n1)+1 is divisible by



3142.

If the integers m and n are chosen at random between 1 and 100, then the probability that a number of the form 7m+7n is divisible by 5 equals

Answer»

If the integers m and n are chosen at random between 1 and 100, then the probability that a number of the form 7m+7n is divisible by 5 equals

3143.

If the sum of the series 1+2r+3r2+4r3+⋯∞ is 94, then the value of r is

Answer»

If the sum of the series 1+2r+3r2+4r3+ is 94, then the value of r is

3144.

What is the value of cos x in second quadrant if sin x = 3/5 in II quadrant

Answer»

What is the value of cos x in second quadrant if sin x = 3/5 in II quadrant


3145.

column1column2ap)xbq)−xcr)x2ds)x4 Match the graphs with their corresponding functions.

Answer»

column1column2ap)xbq)xcr)x2ds)x4

Match the graphs with their corresponding functions.


3146.

If z1,z2,z3 are complex numbers such that |z1|=|z2|=|z3|=∣∣1z1+1z2+1z3∣∣=1, then |z1+z2+z3| is

Answer»

If z1,z2,z3 are complex numbers such that |z1|=|z2|=|z3|=1z1+1z2+1z3=1, then |z1+z2+z3| is

3147.

Find the Integral of the given function w.r.t x Y=3x2−1√x

Answer»

Find the Integral of the given function w.r.t x

Y=3x21x


3148.

The numerical value of cosec θ[1−cosθsinθ+sinθ1−cosθ]−2cot2θ is

Answer»

The numerical value of cosec θ[1cosθsinθ+sinθ1cosθ]2cot2θ is

3149.

If sinθ=35, where θ∈(0,π2),then (sec2θ+tan2θ) is 17k.then the value of k is .

Answer» If sinθ=35, where θ(0,π2),then (sec2θ+tan2θ) is 17k.

then the value of k is .
3150.

Given the following data, find out median: Age 20−25 25−30 30−35 35−40 40−45 45−50 50−55 55−60 Number of Students 50 70 100 180 150 120 70 60

Answer» Given the following data, find out median:

























Age 20−25 25−30 30−35 35−40 40−45 45−50 50−55 55−60
Number of Students 50 70 100 180 150 120 70 60