यदि $f : R \to R$ एक सतत फलन है,जैसे कि $f(x) = \int\limits_1^x {tf(t)dt}$,तो सही कथन है -

  • A
    $\int\limits_{ - \pi }^x {f(x)dx = 2\pi }$
  • B
    $\int\limits_{ - \pi }^x {f(x)dx = \pi }$
  • C
    $\int\limits_{ - 3}^3 {f(x)dx = 0}$
  • D
    $\int\limits_{ - 3}^3 {f(x)dx = 12}$

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