ધારો કે $f(x)=ax^3+bx^2+cx+41$ એવું છે કે $f(1)=40, f'(1)=2$ અને $f''(1)=4$. તો $a^2+b^2+c^2$ ની કિંમત શોધો:

  • A
    $62$
  • B
    $73$
  • C
    $54$
  • D
    $51$

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જો $ y = (\tan^{-1} x)^2 $ હોય,તો $ (x^2 + 1)^2 y_2 + 2x(x^2 + 1) y_1 $ ની કિંમત શોધો.

જો $y=3 \cos (\log x)+4 \sin (\log x)$ હોય,તો સાબિત કરો કે $x^{2} y_{2}+x y_{1}+y=0$.

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