JEE MATHEMATICS MCQ: DIFFERENTIAL EQUATIONS

1 Easy

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Analyzing +4 | -1

Let

\frac{{dy}}{{dx}} = \frac{{ax - by + a}}{{bx + cy + a}},

where

a,b,c

are constants, represents a circle passing through the point (2, 5). Then the shortest distance of the point (11, 6) from this circle is

View answer and explanation

Correct option: B

Option B (8) is correct because after integrating the differential equation and using the given point to find the circle's equation, the shortest distance from the point (11, 6) to the circle is calculated to be 8.

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Let

y=y(x)

be the solution of the differential equation

\left(3 y^{2}-5 x^{2}\right) y d x+2 x\left(x^{2}-y^{2}\right) d y=0

such that

y(1)=1

. Then

\left|(y(2))^{3}-12 y(2)\right|

is equal to : The degree and order of the differential equation whose solution is a parabola whose axis is

x

-axis, are If

{x^2} + {y^2} = 1

, then

\left( {y' = \frac{{dy}}{{dx}},y'' = \frac{{{d^2}y}}{{d{x^2}}}} \right)

x = A\cos 4t + B\sin 4t,

then

\frac{{{d^2}x}}{{d{t^2}}}

is equal to Let

y=y_{1}(x)

and

y=y_{2}(x)

be the solution curves of the differential equation

\frac{d y}{d x}=y+7

with initial conditions

y_{1}(0)=0

and

y_{2}(0)=1

respectively. Then the curves

y=y_{1}(x)

and

y=y_{2}(x)

intersect at Let

y=y(t)

be a solution of the differential equation

\frac{d y}{d t}+\alpha y=\gamma e^{-\beta t}

where,

\alpha>0, \beta>0

and

\gamma>0

. Then

\lim \limits_{{x \rightarrow \infty}} y(t)