MCQ
$\int_{}^{} {{x^3}\sqrt {3 + 5{x^4}} } \;dx = $
- A${(3 + 5{x^4})^{3/2}} + c$
- B$\frac{1}{5}{(3 + 5{x^4})^{3/2}} + c$
- ✓$\frac{1}{{30}}{(3 + 5{x^4})^{3/2}} + c$
- Dએકપણ નહિ.
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$f(x+y)+f(x-y)=2 f(x) f(y), f\left(\frac{1}{2}\right)=-1 $ તો $\sum_{\mathrm{k}=1}^{20} \frac{1}{\sin (\mathrm{k}) \sin (\mathrm{k}+\mathrm{f}(\mathrm{k}))}$ ની કિમંત મેળવો.