1/162
2*3=6
6*3=18
18*3=54
54*3=162
Answer:
x= -1/6
Alternative form:
x= -0.16, x= -6^-1
You can start with the indefinite integral
... ∫e^(ax)·dx = (1/a)e^(ax) +c
Then your definite integral is

Notice, is really the same. All we do is, "insert one function into the other".
so, a way to do it is, get the value of the first one, then insert that output into the second.