જો $u = \int e^{ax} \cos bx \, dx$ અને $v = \int e^{ax} \sin bx \, dx$ હોય,તો $(a^2 + b^2)(u^2 + v^2) = $

  • A
    $2e^{ax}$
  • B
    $(a^2 + b^2)e^{2ax}$
  • C
    $e^{2ax}$
  • D
    $(a^2 - b^2)e^{2ax}$

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જો $\int e^{x^2} \cdot x^3 \, dx = e^{x^2} f(x) + c$ અને $f(1) = 0$ હોય (જ્યાં $c$ એ સંકલનનો અચળાંક છે),તો $f(x)$ ની કિંમત શોધો.

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