engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Integral Calculus Indefinite Integrals
If x = \(\rm \displaystyle\int_0^y \frac{d t}{\sqrt{1+9 t^2}}\) and \(\rm\frac{d^2 y}{d x^2}\) = ay, then a is equal to
1
3
2
6
3
9
4
1