MCQ
The domain of the function $ \text{f}(\text{x}) = \sqrt{(2-2\text{x}-\text{x2})}$ is:
- A$ – \sqrt{3} ≤ \times ≤ \sqrt{3}$
- B$ -1– \sqrt{3} ≤ \times ≤ -1+\sqrt{3}$
- C$ -2 ≤ \times ≤ 2$
- D$ -2 – \sqrt{3} ≤\times ≤ – 2 + \sqrt3 $
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If in the expansion of $(\text{a}+\text{b})^{\text{n}}$ and $(\text{a}+\text{b})^{\text{n}}+3,$ the ratio of the coefficients of coefficients of second and third terms, and third and fourth terms respectively are equal, then n is:
If rth term is the middle term in the expansion of $\Big(\text{x}^{2}-\frac{1}{2\text{x}}\Big)^{20},$ then (r + 3)th term is:
${^\text{20}}\text{C}_{\text{14}}\ \Big(\frac{\text{x}}{2^{14}}\Big)$
${^\text{20}}\text{C}_{\text{12}}\ \text{x}^{2}\ 2^{-12}$
$-{^\text{20}}\text{C}_{\text{7}}\ \text{x}\ 2^{-13}$
None of these.