engineering recuitment NIELIT Scientific Assistant Mock Test 2025 Engineering Mathematics Calculus Definite Integrals
If f(x) is an even function and a is a positive real number, then \(\mathop \smallint \limits_{ - a}^a f\left( x \right)dx\) equals
1
0
2
a
3
2a
4
\(2\mathop \smallint \limits_0^a f\left( x \right)dx\)