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14 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
If $y=\cos \sqrt{x}$, then the value of $\frac{d y}{d x}$ will be ________ .
Answer
$\frac{-\sin \sqrt{x}}{2 \sqrt{x}}$
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Question 21 Mark
Dfferentiation of $\cos (\sqrt{x})$ w.r.t. $x$ is ________ .
Answer
$-\frac{\sin (\sqrt{x})}{2 \sqrt{(x)}}$
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Question 131 Mark
If $f(x)=\left\{\begin{array}{cc}\frac{\sin ^2 a x}{x^2} & , x \neq 0 \\ 1 & , x=0\end{array}\right.$ is continuous function at _________ .
Answer
$\pm 1$
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Question 141 Mark
If $f(x)=\left\{\begin{array}{c}\frac{x^3-a^3}{x-a}, x \neq a \\ b, x=a\end{array}\right.$, is continuous at $x=a$ then $b=$ _________ .
Answer
$3 a^2$
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