3
2
1 1
dx
+x
∫
 equals
(A)
π3
(B)
π32
(C)
π6
(D) 12
π
22 2
3
2
0 4
9
dx
x
+
∫
 equals
(A) 6
π
(B) 12
π
(C) 24
π
(D) 4
π
7 9  Evaluation of Definite Integrals by Substitution
In the previous sections, we have discussed several methods for finding the indefinite
integral One of the important methods for finding the indefinite integral is the method
of substitution