jf(x)dc= F(b)-F(a)
a
3 \f{x)dx=F{x)+C
J (x2 + \}cbc =
J (x2 +1) dx = J x2dx + J1 dx = — x3 +x +C
fi>
-1 L
[9 + 3]
1 3
— X +x
3
1-1
3 ^33 + 3 3
= 12 + —+ 1 = 134