Suppose a pyramid has a square base of length 3 m in each side and a height of 5 m. What is the volume of that pyramid?

$\lim _{x \rightarrow 0} \int_{0}^{x} \frac{\left(\tan ^{-1} t\right)^{2}}{\sqrt{1+x^{2}}} d t$  is equal to-

যদি $\int Q \left ( x \right ) dx = \ln{\left ( \ln{x} \right )} + c$ হয়,  যেখানে c একটি ধ্রুবক, তবে Q(x)=?

Let $g(x)=\displaystyle \int _{1-x}^{1+x}t|f'(t)|dt$, where $f(x)$ does not behave like a constant function in any interval $(a,b)$ and the graph of $y=f'(x)$ is symmetric about the line $x=1$, then

  $\frac{d^{2} y}{dx^{2}} = \left ( \frac{1}{x^{2}} \right )$ হলে y এর মান নিচের কোনটি ?