જો $4\left[ {{x^2} + \frac{{{x^6}}}{3} + \frac{{{x^{10}}}}{5} + \dots} \right] = {y^2} + \frac{{{y^4}}}{2} + \frac{{{y^6}}}{3} + \dots$ હોય,તો

  • A
    ${x^2}y = 2x - y$
  • B
    ${x^2}y = 2x + y$
  • C
    $x = 2{y^2} - 1$
  • D
    ${x^2}y = 2x + {y^2}$

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Similar Questions

$\frac{1}{1 \cdot 2} - \frac{1}{2 \cdot 3} + \frac{1}{3 \cdot 4} - \frac{1}{4 \cdot 5} + \dots \infty = $

$\frac{1}{2} + \frac{3}{2} \cdot \frac{1}{4} + \frac{5}{3} \cdot \frac{1}{8} + \frac{7}{4} \cdot \frac{1}{16} + \dots \infty = $

$1 + \frac{2}{3} - \frac{2}{4} + \frac{2}{5} - \dots \infty = $

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:

જો $0 < a, b < 1$ અને $\tan^{-1} a + \tan^{-1} b = \frac{\pi}{4}$ હોય,તો $(a+b) - \left(\frac{a^2+b^2}{2}\right) + \left(\frac{a^3+b^3}{3}\right) - \left(\frac{a^4+b^4}{4}\right) + \dots$ ની કિંમત ..... છે.

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