જો $\frac{d}{dx} \left( \frac{x^4 + x^2 + 1}{x^2 + x + 1} \right) = ax + b$ હોય,તો $a - b =$ શું થાય?

  • A
    $3$
  • B
    $4$
  • C
    $1$
  • D
    $2$

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$x = 1$ આગળ વિધેય $\left[ \cos^{-1}\left( \sin \sqrt{\frac{1+x}{2}} \right) + x^x \right]$ નું $x$ ની સાપેક્ષે પ્રથમ વિકલિત શોધો.

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