$\frac{1-2x-x^2}{e^{-x}}$ ના વિસ્તરણમાં $x^k$ નો સહગુણક શું છે?

  • A
    $\frac{1-k-k^2}{k!}$
  • B
    $\frac{k^2+1}{k!}$
  • C
    $\frac{1-k}{k!}$
  • D
    $\frac{1}{k!}$

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Similar Questions

શ્રેણી $\frac{2}{1!} + \frac{6}{2!} + \frac{12}{3!} + \frac{20}{4!} + \dots$ નો સરવાળો કેટલો થાય?

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

અનંત શ્રેણી $1+\frac{1}{2!}+\frac{1 \cdot 3}{4!}+\frac{1 \cdot 3 \cdot 5}{6!}+\dots$ નો સરવાળો કેટલો થાય?

$1 - x + \frac{x^2}{2!} - \frac{x^3}{3!} + \dots \infty = $

$\frac{1}{2} + \frac{1}{4} + \frac{1}{8 \times 2!} + \frac{1}{16 \times 3!} + \frac{1}{32 \times 4!} + \dots \infty = $

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