COMEDK202510 May 2025Morning ShiftMathematicsDefinite IntegrationActual
₀^ e^ x e^ x +e^ - x d x is equal to
Options
- A2
- B2
- C4
Correct answer
A. 2
Step-by-step solution
Let I = ₀^ e^ x e^ x + e^ - x dx . Using the property ₀^a f(x) dx = ₀^a f(a-x) dx , we have: I = ₀^ e^ ( -x) e^ ( -x) + e^ - ( -x) dx Since ( -x) = - x , the integral becomes: I = ₀^ e^ - x e^ - x + e^ x dx Adding the two expressions for I : 2I = ₀^ ( e^ x e^ x + e^ - x + e^ - x e^ x + e^ - x ) dx 2I = ₀^ e^ x + e^ - x e^ x + e^ - x dx 2I = ₀^ 1 dx = I = 2 Answer: 2