JEE Main20204 Sep 2020Morning ShiftMathematicsDefinite IntegrationActual
Let f x = x - 2 and g x = f f x , x ∈ 0 , 4 . Then ∫ 0 3 g x - f x d x is equal to
Options
- A1
- B0
- C1 2
- D3 2
Correct answer
A. 1
Step-by-step solution
f x = x − 2 = 2 − x ;       x < 2 x − 2 ;        x ≥ 2 g x = f f x = 2 − f x ;       f x < 2 f x − 2 ;        f x ≥ 2 = 2 − 2 − x ;          2 − x < 2 ,      x < 2 2 − x − 2 ;          2 − x ≥ 2 ,