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

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

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