Explain why each of the following integrals is improper.

(a) f 2 x / x - 1 dx

1

(b) f oo 1 / 1 + x3 dx

0

© f oo x2e-x2 dx

-oo

(d) f π/4 cos x dx

0

Explain why each of the following integrals is improper.

(a) f 2 x / x - 1 dx

1

(b) f oo 1 / 1 + x3 dx

0

© f oo x2e-x2 dx

-oo

(d) f π/4 cos x dx

0