BITSAT2012MathematicsIndefinite IntegrationActual
Evaluate: x 4- x ³ dx
Options
- A2 3 ⁻¹ ( x^ 3 / 2 2 )+c
- B2 3 ⁻¹ (x^ 3 / 2 )+c
- C2 ⁻¹ ( x^ 3 / 2 2 )+c
- D1 3 ⁻¹ ( x ^ 3 / 2 2 )+ c
Correct answer
A. 2 3 ⁻¹ ( x^ 3 / 2 2 )+c
Step-by-step solution
I= x 4-x³ d x= x d x 4-x³ Here integral of x = 2 3 x^ 3 / 2 and 4-x³=4- (x^ 3 / 2 )² Put x^ 3 / 2 =t x d x= 2 3 d t So I= 2 3 d t 4-t² = 2 3 ⁻¹ ( x^ 3 / 2 2 )+c