यदि $f(x) = \begin{cases} 4x + 3, & 1 \le x \le 2 \\ 3x + 5, & 2 < x \le 4 \end{cases}$ है,तो $\int_1^4 f(x) \, dx = $

  • A
    $80$
  • B
    $20$
  • C
    $-20$
  • D
    $37$

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$\int_{-2}^{2} |[x]| \, dx = $

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यदि $\int_a^b x^3 dx = 0$ और $\int_a^b x^2 dx = \frac{2}{3}$ है,तो

$\int_{1 / 2}^2\left|\log _{10} x\right| d x=$

$3. \int_0^{\frac{1}{2}} \frac{x \sin^{-1} x}{\sqrt{1-x^2}} dx =$

सिद्ध कीजिए कि $\int_{0}^{\frac{\pi}{2}} \sin^{3} x \, dx = \frac{2}{3}$.

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