જો $y = f(x^2 + 2)$ અને $f'(3) = 5$ હોય,તો $x = 1$ આગળ $\frac{dy}{dx}$ ની કિંમત શોધો.

  • A
    $5$
  • B
    $15$
  • C
    $20$
  • D
    $10$

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