જો $N = \frac{\sqrt{7} - \sqrt{3}}{\sqrt{7} + \sqrt{3}}$ હોય,તો $N + \frac{1}{N}$ ની કિંમત શું થાય?

  • A
    $2 \sqrt{21}$
  • B
    $5$
  • C
    $10$
  • D
    $13$

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જો $x=\sqrt{\frac{\sqrt{5}+1}{\sqrt{5}-1}}$ હોય,તો $5x^{2}-5x-1$ ની કિંમત શોધો.

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જો $\frac{x^{24}+1}{x^{12}}=7$ હોય,તો $\frac{x^{72}+1}{x^{36}}$ ની કિંમત શોધો.

$\frac{1}{1 \times 2} + \frac{1}{2 \times 3} + \frac{1}{3 \times 4} + \ldots + \frac{1}{9 \times 10}$ ની કિંમત શોધો.

$(2+1)(2^{2}+1)(2^{4}+1)(2^{8}+1)$ નું સાદું રૂપ શું છે?

$(3+2 \sqrt{2})^{-3}+(3-2 \sqrt{2})^{-3}$ ની કિંમત શોધો.

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