यदि $a \le x \le b$ के लिए $\frac{d[f(x)]}{dx} = g(x)$ है,तो $\int_a^b f(x)g(x) dx$ का मान क्या होगा?

  • A
    $f(b) - f(a)$
  • B
    $g(b) - g(a)$
  • C
    $\frac{[f(b)]^2 - [f(a)]^2}{2}$
  • D
    $\frac{[g(b)]^2 - [g(a)]^2}{2}$

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