$\log_e(1 + 3x + 2x^2)$ ના વિસ્તરણમાં $x^n$ નો સહગુણક શું છે?

  • A
    $(-1)^n \left[ \frac{2^n + 1}{n} \right]$
  • B
    $\frac{(-1)^{n+1}}{n} [2^n + 1]$
  • C
    $\frac{2^n + 1}{n}$
  • D
    આમાંથી કોઈ નહીં

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Similar Questions

જો $0 < x < 1$ હોય,તો $\frac{3}{2} x^{2} + \frac{5}{3} x^{3} + \frac{7}{4} x^{4} + \ldots$ ની કિંમત શોધો:

$1 + \frac{2}{1 \times 2 \times 3} + \frac{2}{3 \times 4 \times 5} + \frac{2}{5 \times 6 \times 7} + \dots$ નો સરવાળો કેટલો થાય?

$\frac{4}{1 \times 3} - \frac{6}{2 \times 4} + \frac{12}{5 \times 7} - \frac{14}{6 \times 8} + \dots \infty = $

$\frac{x - 1}{x + 1} + \frac{1}{2} \cdot \frac{x^2 - 1}{(x + 1)^2} + \frac{1}{3} \cdot \frac{x^3 - 1}{(x + 1)^3} + \dots \infty = $

જો $\tanh ^{-1} x = a \log \left(\frac{1+x}{1-x}\right)$, $|x| < 1$ હોય, તો $a$ ની કિંમત શોધો.

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