જો $y = (\cos^{-1} x)^2$ હોય,તો $(1-x^2) y_2 + p x y_1 + q = 0$ થાય. $p+q$ ની કિંમત શોધો.

  • A
    -$1$
  • B
    $3$
  • C
    -$3$
  • D
    $0$

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