Question 1 1 pts The improper integral a . edx is equal to which of the following expressions? O lim (x . e *] dx T-+00 O lim (x . e ] dx r-+00 O lim D . edx b-+00 O b lim . edx b-+00 2Question 2 1 pts Read Example 3 on Page 511. and answer: Which of the following integrals converges? w {a Question 3 1 pts Let f () = V9 - C 9 Why is the integral f(x) dax an improper integral? Of(x) is undefined for any > > 9. Of(x ) is undefined at r=0. Of(x) is undefined at r=9. Of(x) is undefined for any r