$ =\lim _{x \rightarrow \frac{\pi}{2}} \frac{-\{2 \sin x \cos x+\cos x\} 3 x^2}{2\left(x-\frac{\pi}{2}\right)} $
$ =\lim _{x \rightarrow \frac{\pi}{2}}\left\{\frac{2 \sin x \sin \left(\frac{\pi}{2}-x\right)}{2\left(x-\frac{\pi}{2}\right)}+\frac{\sin \left(\frac{\pi}{2}-x\right)}{2\left(\frac{\pi}{2}-x\right)}\right\} 3 x^2 $
$ =\left(1(1)+\frac{1}{2}\right) 3\left(\frac{\pi}{2}\right)^2 $
$ =\frac{9 \pi^2}{8}$
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| $X$ | $1$ | $3$ | $5$ | $7$ | $9$ |
| આવૃતિ $(f)$ | $4$ | $24$ | $28$ | $\alpha$ | $8$ |
નો મધ્યક $5$ છે.જો માહિતીના મધ્યક સાપેક્ષ સરેરાશ વિચલન અને વિચરણ અનુક્રમે $m$ અને $\sigma^2$ હોય, તો $\frac{3 \alpha}{m+\sigma^2}=........$