Question(s) from Search: IIT

A and B are two separate reservoirs of water. Capacity of reservoir A is double the capacity of reservoir B. Both the reservoirs are filled completely with water, their inlets are closed and then water is released simultaneously from both the reservoirs. The rate of flow of water out of each reservoir at any instant of time is proportionate to the quantity of water in the reservoir at the time. One hour after the water is released the quantity of water in reservoir A is   times the quantity of water in reservoir B. After how many hours do both the reservoirs have the same quantity of water?

a)

b)

c) ln2

d)  

The area of the quadrilateral formed by the tangents at the end points of latus rectum to the ellipse  is

a)  square units

b)

c)  square units

d) 27 square units

Let –1 ≤ p ≤ 1. Show that the equation 4x³ – 3x – p = 0 has a unique root in the interval  and identify it.

a) p

b) p/3

c)

d)

Find the coordinates of all points P on the ellipse , for which the area of △PON is maximum where O denotes the origin and N the feet of perpendicular from O to the tangent at P.

Determine the equation of the curve passing through origin in the form  which satisfies the differential equation

If α, β are roots of  and γ, δ are roots of  then evaluate  in terms of p, q, r, s.

If p(x) = 51x¹⁰¹ – 2323x¹⁰⁰ – 45x + 1035, using Rolle’s theorem prove that at least one root lies between .

For what values of m does the system of equations 3x + my = m, 2x – 5y = 20 have solutions satisfying x > 0, y > 0?

a) m ε (

b) m ε (

c) m ε ( ∪ (

d) m ε (

Given

 
and f(x) is a quadratic polynomial. V is a point of maximum of f(x) and ‘A’ is the point where f(x) cuts the X–axis. ‘B’ is a point such that AB subtends a right angle at V. Find the area between chord AB and f(x).

a) 125

b) 125/2

c) 125/3

d) 125/6

The area enclosed within the curve |x| + |y| = 1 is .  .  .

a) 1

b)

c)

d) 2

Let a hyperbola pass through the foci of the ellipse  . The transverse and conjugate axes of the hyperbola coincide with the major and minor axes of the given ellipse. Also the product of the eccentricity of the given ellipse and hyperbola is 1 then

a) Equation of the hyperbola is

b) Equation of the hyperbola is

c) Focus of the hyperbola is (5, 0)

d) Vertex of the hyperbola is

The integral $\underset{2}{\overset{4}{\int }}\frac{{\mathrm{logx}}^2}{{\mathrm{logx}}^2+\log \left(x^2-12x+36\right)}\mathrm{dx}$

is equal to

a) 2

b) 4

c) 1

d) 6

Fifteen coupons are numbered 1, 2, 3, .  .  .   ., 15 respectively. Seven coupons are selected at random one at a time with replacement. The probability that the largest number appearing on a selected coupon is 9 is

a)

b)

c)

d) None of these

Match the statement of column 1 and the properties of column 2

The value of the integral $\underset{\sqrt{\log 2}}{\overset{\sqrt{\log 3}}{\int }}\frac{x\sin x^2}{\sin x^2+\sin \left(\log 6-x^2\right)}\mathrm{dx}$

is equal to

a) $\frac{1}{4}\log \frac{3}{2}$

b) $\frac{1}{2}\log \frac{3}{2}$

c) $\log \frac{3}{2}$

d) $\frac{1}{6}\log \frac{3}{2}$

Let g(x) be a function of x defined on (−1, 1). If the area of the equilateral triangle with two of its vertices as (0, 0) and [x, g(x)] is , then the function g(x) is

a)

b)

c)

d) None of the above

Show that the integral of   is

A circle C of radius 1 is inscribed in an equilateral triangle PQR. The point of contacts of C with its sides PQ, QR and RP are D, E, F respectively. The line PQ is given by  and the point D is . Further, it is given that the origin and the centre of C are on the same side of the line PQ. The equation of circle C is

a)

b)

c)

d)

One or more than one correct options

Let F : ℝ → (0, 1) be a continuous function. Then which of the following function(s) has (have) the value zero at some point in the interval (0, 1)?

a) $e^x-\underset{0}{\overset{x}{\int }}f\left(t\right)\mathrm{sint}\mathrm{dt}$

b) $f\left(x\right)+\underset{0}{\overset{\frac{\pi }{2}}{\int }}f\left(t\right)\mathrm{sint}\mathrm{dt}$

c) $x-\underset{0}{\overset{\frac{\pi }{2}-x}{\int }}f\left(t\right)\mathrm{cost}\mathrm{dt}$

d) $x^9-f(x)$

Consider a branch of the hyperbola
 
with vertex at the point A. Let B be one of the end points of its latus rectum. If C is the focus of the hyperbola nearest to the point A, then the area of triangle ABC is

a)

b)

c)

d)

One or more than one correct options

The value(s) of $\underset{0}{\overset{1}{\int }}\frac{x^4{(1-x)}^4}{{1+x}^2}\mathrm{dx}$

is (are)

a) $\frac{22}{7}-\pi$

b) $\frac{2}{105}$

c) $0$

d) $\frac{71}{15}-\frac{3\pi }{2}$

 =

a) True

b) False

For non-zero vectors a, b, c,  holds if and only if

a) a . b = 0, b . c = 0

b) b . c = 0, c . a = 0

c) c . a = 0, a . b = 0

d) a . b = 0, b . c = 0, c . a = 0

$\underset{-2}{\overset{2}{\int }}\frac{{3x}^2}{1+e^x}\mathrm{dx}$

equals

a) 8

b) 2

c) 4

d) 0

The value of $\underset{0}{\overset{1}{\int }}{4x}^3\left[\frac{d^2}{{\mathrm{dx}}^2}{\left(1-x^2\right)}^5\right]\mathrm{dx}$

is

a) 4

b) 0

c) 2

d) 6