Math Is Fun Forum
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
You are not logged in.
- Topics: Active | Unanswered
Pages: 1
#1 2009-09-01 04:31:47
- Identity
- Member
- Registered: 2007-04-18
- Posts: 934
changing variables in a pdf
There is the pdf
and
. You need to find .I used two methods but they come up with difference results:
1.
The cdf
So
Note that I used the formula
2.
Using the formula
Last edited by Identity (2009-09-01 18:46:47)
Offline
#2 2009-09-01 04:51:57
- juriguen
- Member
- Registered: 2009-07-05
- Posts: 59
Re: changing variables in a pdf
Hi!
You have to differentiate in order to obtain the pdf out of the cdf!
I think then they results match!
Jose
Make everything as simple as possible, but not simpler. -- Albert Einstein
Offline
#3 2009-09-01 18:44:08
- Identity
- Member
- Registered: 2007-04-18
- Posts: 934
Re: changing variables in a pdf
Thanks juiguen, I just realised I got the formula for integration wrong:
Last edited by Identity (2009-09-01 19:10:05)
Offline
#4 2009-09-01 19:15:32
- juriguen
- Member
- Registered: 2009-07-05
- Posts: 59
Re: changing variables in a pdf
Sure!
I actually hadn't realized how you had used that formula, and not I see it, so go for both 
Jose
Make everything as simple as possible, but not simpler. -- Albert Einstein
Offline
Pages: 1