If $(a+\frac{1}{a})^{2}=3,$ then $a^{3}+\frac{1}{a^{3}}=?$

  • A
    $2 \sqrt{3}$
  • B
    $2$
  • C
    $3 \sqrt{3}$
  • D
    $0$

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What is the value of $\frac{2.75 \times 2.75 \times 2.75 - 2.25 \times 2.25 \times 2.25}{2.75 \times 2.75 + 2.75 \times 2.25 + 2.25 \times 2.25}$?

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If $2x + \frac{1}{3x} = 6$,then $3x + \frac{1}{2x}$ is equal to

$\frac{\frac{64}{121}-\frac{9}{64}}{\frac{8}{11}+\frac{3}{8}} = ?$

What approximate value will come in place of the question mark $(?)$ in the given equation? (You are not expected to calculate the exact value)
$24.98^{2} \times \frac{16.02^{2}}{(7.98 \times 15.04)} \times 38.93 = 130 \times ?^{2}$

$11.6 + 9.28 + 0.464 - 0.2828 + 0.07 = ?$

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