$(e^x - 1)(e^{-x} + 1)$ ના વિસ્તરણમાં,$x^3$ નો સહગુણક શોધો.

  • A
    $0$
  • B
    $1/3$
  • C
    $2/3$
  • D
    $1/6$

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Similar Questions

$\sum_{n=1}^{\infty} \frac{2n}{(2n+1)!}$ ની કિંમત શોધો.

$1 + \frac{2}{3!} + \frac{3}{5!} + \frac{4}{7!} + \dots \infty = \,$

શ્રેણી $1 + \frac{1}{4 \cdot 2!} + \frac{1}{16 \cdot 4!} + \frac{1}{64 \cdot 6!} + \dots$ અનંત સુધીનો સરવાળો શું થાય?

$3 + \frac{5}{1!} + \frac{7}{2!} + \frac{9}{3!} + \dots \infty = $

$\frac{2}{2!} + \frac{2+4}{3!} + \frac{2+4+6}{4!} + \dots$ ની કિંમત શોધો.

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