જો $y = a \sin x + (5 + 2x) \cos x$ હોય,તો $y'' + y =$

  • A
    $4 \cos x$
  • B
    $-4 \cos x$
  • C
    $4 \sin x$
  • D
    $-4 \sin x$

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જો $y=a \cos (\log x)+b \sin (\log x)$,જ્યાં $a, b$ પ્રાચલો છે,તો $x^2 y^{\prime \prime}+x y^{\prime}$ ની કિંમત શોધો.

$\frac{d^2}{dx^2}(2\cos x \cos 3x) = $

જો $f(x) = a\sin (\log x)$ હોય,તો ${x^2}f''(x) + xf'(x) = . . . $

જો $(a+bx) e^{\frac{y}{x}}=x$ હોય,તો $x^3 \frac{d^2 y}{d x^2}$ ની કિંમત શોધો.

જો $0 < x < \frac{2}{3}$ માટે $y=x \log \left(\frac{x}{2-3 x}\right)$ હોય,તો $x=\frac{1}{2}$ આગળ $\frac{d^2 y}{d x^2}$ ની કિંમત શોધો.

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