જો $f(2)=4$ અને $f^{\prime}(2)=1$ હોય,તો $\lim _{x \rightarrow 2} \frac{x f(2)-2 f(x)}{x-2}$ ની કિંમત શોધો.

  • A
    $-2$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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જો $y=a \sin x+b \cos x$ હોય,તો $y^2+\left(\frac{d y}{d x}\right)^2$ એ

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