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

  • A
    $f(x)$
  • B
    $-f(x)$
  • C
    $0$
  • D
    $1$

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Similar Questions

$y=7 \sin x+5 \cos x$ માટે,જો $\frac{d^2 y}{d x^2}-m y=0$ હોય,તો $m=$ . . . . . .

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જો $y = a{e^x} + b{e^{-x}} + c$ જ્યાં $a, b, c$ પ્રાચલો (parameters) હોય,તો $y''' = $

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