If $x=\frac{3 t}{1+t^2}, y=\frac{3 t^2}{1+t^2}$, then $d y / d x$ at $t=2$ is

JEE MATHEMATICS MCQ: DIFFERENTIATION

1 Medium

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Application +4 | -1

x=\frac{3 t}{1+t^2}, y=\frac{3 t^2}{1+t^2}

, then

d y / d x

t=2

View answer and explanation

Correct option: C

-\frac{4}{3}

Option C (

-\frac{{4}}{{3}}

) is correct because it is the value of

\frac{{dy}}{{dx}}

calculated using parametric differentiation at

t=2

Practice All Chapter MCQs →

f(x)=|x|^{|\tan x|}

f^{\prime}\left(\frac{-\pi}{6}\right)

x

y

x>0

x y=1

x+y

f(x)=[x] \sin (\pi x)

[x]

x

x=k, k

f(x)

y = {\sec ^{ - 1}}\left[ {\mathrm{cosec}x} \right] + \mathrm{cose}{\mathrm{c}^{ - 1}}\left[ {\sec x} \right] + {\sin ^{ - 1}}[\cos x] + {\cos ^{ - 1}}[\sin x],

\frac{{dy}}{{dx}}

\frac{d}{d x} \sin ^{-1}\left(3 x-4 x^{3}\right)

z = y + f\left( v \right),

v = \left( {\frac{x}{y}} \right),

v\frac{{\partial z}}{{\partial x}} + \frac{{\partial z}}{{\partial y}}