SOLUTION: Please help me solve this equation: Explain why the following integrals are improper and determine whether they are convergent or divergent. Evaluate those that are convergent.

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Question 363294: Please help me solve this equation:
Explain why the following integrals are improper and determine whether they are
convergent or divergent. Evaluate those that are convergent.
a. +int+%28x%2Fsqrt%28x-1%29%2C+dx%2C+1%2C+2+%29+
b. +int+%28+1%2F+%281%2Bx%5E2%29%2C+dx%2C+-infinity%2C+infinity+%29+
c. +int+%28+xe%5E%28-3x%29%2C+dx%2C+0%2C+infinity+%29+
d. +int+%28+1%2F+%28xln%5E2x%29%2C+dx%2C+pi%2C+infinity+%29+
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a) Convergent,A=8%2F3
b) Convergent, A=pi
c) Convergent, A=1%2F9
d) Convergent, A=1%2Fln%28pi%29