MCQOPTIONS
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MCQOPTIONS
| 1. |
If \[n\] is even, then in the expansion of \[{{\left( 1+\frac{{{x}^{2}}}{2\,!}+\frac{{{x}^{4}}}{4\,!}+...... \right)}^{2}}\], the coefficient of \[{{x}^{n}}\] is |
| A. | \[\frac{{{2}^{n}}}{n\,!}\] |
| B. | \[\frac{{{2}^{n}}-2}{n\,\,!}\] |
| C. | \[\frac{{{2}^{n-1}}-1}{n\,!}\] |
| D. | \[\frac{{{2}^{n-1}}}{n\,!}\] |
| Answer» E. | |