$\frac{1^2 \cdot 2}{1!} + \frac{2^2 \cdot 3}{2!} + \frac{3^2 \cdot 4}{3!} + \dots \infty = $ ($e$ માં)

  • A
    $6$
  • B
    $7$
  • C
    $8$
  • D
    $9$

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Similar Questions

શ્રેણી $\frac{1}{2!} - \frac{1}{3!} + \frac{1}{4!} - \dots$ નો સરવાળો શું થાય?

$1 + \frac{a - bx}{1!} + \frac{(a - bx)^2}{2!} + \frac{(a - bx)^3}{3!} + \dots \infty = $

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

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

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

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