KCET2021MathematicsDefinite Integration
The value of ₀⁴⁰⁴² x d x x + 4042-x is equal to
Options
- A4042
- B2021
- C8084
- D1010
Correct answer
B. 2021
Step-by-step solution
Let I= ₀⁴⁰⁴² x x + 4042-x d x...(i) Using the property, ₀^ a f(x) d x= ₀^ a f(a-x) d xI= ₀⁴⁰⁴² 4042-x 4042-x + x ...(ii) Adding Eqs. (i) and (ii), 2 I= ₀⁴⁰⁴² x + 4042-x 4042-x + x d x 2 I= ₀⁴⁰⁴² 1 d x 2 I=4042 I=2021