00:02
In this question, we are required to compute, we are required to consider this improper integral.
00:09
Okay, for convenience, let's just define a to be just this kind of string, very long number.
00:18
A is just equal to 0 .0001.
00:22
Okay, so this integral can be written as the range goes from minus infinity to four, e to the a t.
00:34
Okay, now just record the definition for integral like that.
00:38
We know it is actually, this thing is actually the limit when n goes to minus infinity.
00:49
And let me just assume n goes to positive infinity and the integral goes from minus n to four and e to the power a t dt.
01:01
I mean, this one, those two things are actually by our definition because this is always the definition for improper integral over some infinite interval.
01:21
Okay, so we only need to consider this one...