$x$ এর একটি ফাংশন $f(x)$ হলে $\int_{ }^{ }\frac{f'\left(x\right)}{f\left(x\right)}dx=$ কত?

  $\int \sin{\left ( 5 - \frac{x}{10} \right )} dx = f{\left ( x \right )} + c$ হলে, f(x)এর মান কত?

$\int \frac{d x}{\sqrt{25-x^{2}}} \quad = ?$

$g(x)=\sqrt{x}$ হলে-

i. $\int \frac{1}{g(x)} d x=2 \sqrt{x}+c$

ii. $\int_{0}^{1} g(x) d x=\frac{2}{3}$

iii. $\int \frac{\sec ^{2} x d x}{g(\tan x)}=2 \sqrt{\tan x}+c$

নিচের কোনটি সঠিক?

  $\int \frac{x}{9 x^{4} + 4} dx = ?$