# functionssssssss

• Dec 18th 2007, 02:53 AM
ohhhh
functionssssssss
we're reviewing for the final and i don't remember how to do this :( i have a feeling it's very simple, and i'm just thinking too hard. any help please?

if f(x) = ax/a+x where a is a constant value and x cannot equal a, find and simplify:

a) f(a)

b) f(1-a)

c) f(1/1-a)
• Dec 18th 2007, 05:28 AM
colby2152
Quote:

Originally Posted by ohhhh
we're reviewing for the final and i don't remember how to do this :( i have a feeling it's very simple, and i'm just thinking too hard. any help please?

if f(x) = ax/a+x where a is a constant value and x cannot equal a, find and simplify:

a) f(a)

b) f(1-a)

c) f(1/1-a)

$f(z) = \frac{ax}{a+x}$

Plug & Chug...

Here is c) $f(\frac{1}{1-a}) = \frac{a\frac{1}{1-a}}{a+\frac{1}{1-a}}$
$f(\frac{1}{1-a}) = \frac{a(1-a)}{(1-a)(a-a^2+1)}$
• Dec 19th 2007, 07:31 AM
ohhhh
ohh duhh.. i knew it was something simple. thanks a lot! :)