Which of the following is an improper integral?

a) integral from 0 to 3 of (x+1)/(3x-2) dx
b) integral from 1 to 3 of (x+1)/(3x-2) dx
c) integral from -1 to 0 of (x+1)/(3x-2) dx
d) None of these

Please help I don't know which one?

3 answers

as someone else already observed,
(x+1)/(3x-2) goes to ∞ at x = 2/3
So, which interval contains this critical point?

answer A?

correct.

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