f(x)= 32/(x+4)^3 for x>0

how do i verify f(x) is a pdf, i know f(x) has to be integrated, but between which limits cos i can't seem to get 1

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- Nov 29th 2012, 01:17 PMoyinkanverify that f(x) is a probability density function
**f(x)= 32/(x+4)^3 for x>0**

how do i verify f(x) is a pdf, i know f(x) has to be integrated, but between which limits cos i can't seem to get 1 - Nov 29th 2012, 03:52 PMGJARe: verify that f(x) is a pdf
Hi oyinkan,

Integrating over $\displaystyle (0, \infty)$ should do the trick.

Good luck! - Nov 29th 2012, 04:31 PMHallsofIvyRe: verify that f(x) is a pdf
The problem

**says**"x> 0" so your integration should be from**0**to infinity.