NTA Abhyas JEE Main2020MathematicsIndefinite IntegrationPractice
The value of the integral ∫ e x 2 + 1 x 2 x 2 - 1 x + 1 d x is equal to (where C is the constant of integration)
Options
- Ae x 2 + 1 x + C
- Bx 2 e x 2 + 1 x + C
- Cx e x 2 + 1 x + C
- Dx ⋅ e x 2 + C
Correct answer
C. x e x 2 + 1 x + C
Step-by-step solution
Ι = ∫ e x 2 + 1 x ⏟ Ι ⋅ 1 ⏟ Ι Ι d x + ∫ e x 2 + 1 x 2 x - 1 x 2 ⋅ x d x Using integration by parts, we get, Ι = e x 2 + 1 x · x - ∫ e x 2 + 1 x 2 x - 1 x 2 ⋅ x d x + ∫ e x 2 + 1 x 2 x - 1 x 2 ⋅ x d x = x e x 2 + 1 x + C