જો $y=a \cos (\log x)+b \sin (\log x)$ હોય,તો $x^2 y_2+x y_1=$

  • A
    $0$
  • B
    $y$
  • C
    $2 y$
  • D
    $-y$

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જો $y^2 = a x^2 + 2 x + c$ હોય,તો $y^3 \frac{d^2 y}{d x^2}$ શું થાય?

જો $y = a_0 + a_1x + a_2x^2 + \dots + a_nx^n$ હોય,તો $n^{th}$ વિકલિત $y_n$ શોધો.

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જો $f(x)=\frac{x-1}{e^x}$ હોય, તો $f^{\prime}(0)+f^{\prime \prime}(0)=$

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