question_answer 118)

Evaluate

Answer:

Let              Let             I = A (x + 1) (x2 + 1) + B(x ? 1)       (x2 + 1) + (Cx + D) (x ? 1) (x + 1)                   x = 0  1 = A ? B + (? D)             x = 2 1 = A (3) (5) + B (5) + (2C + D) (3)                          C = 0                                     Alternative Method :       Let