Hi everyone, I'm trying to do two problems involving definite improper integrals. I'm getting that the answers are both divergent but I was wondering if anyone would be willing to help me show this. I'll list the problems below. Thanks a lot!

The integral of 1/(2x-5) with b = 0 and a = negative infinity

The integral of e^(-2x) with b = -1 and a = negative infinity