Forgot some integration stuff

  • #1
okay the problem asks to integrate this function from 0-infinity
i integrated but the answer i get is e^-lambdax from 0 to infinity
so e^0 is 1
and you will have 1-e^-lambda(x) where x is infinity
how does this come out to be -1?
please explain to me...i think i just forgot a rule
 

Answers and Replies

  • #2
537
1
Hopefully, you're integrating the function f(x) = -lambda*e^(-lambda*x), otherwise your answer is wrong. The integral of this from 0 to infinity is 1. If you are integrating lambda*e^(-lambda*x), then that is -1.
 
  • #3
ok, i think i figured it out. i was completely ignoring the fact that it was a NEGATIVElambda (x). i realized this shortly after posting.
 

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