# Fuction Help!

• November 18th 2007, 03:55 AM
mibamars
Fuction Help!
$f: R -> R, f (x) = ( x + 4 ) ( x^2 - 4x +13 )$

Find the Y intercept of the graph.

Explain why there is no real solution to the equation f(x)=0

Find the stationary points of y= f(x).
• November 18th 2007, 04:07 AM
Jhevon
Quote:

Originally Posted by mibamars
$f: R -> R, f (x) = ( x + 4 ) ( x^2 - 4x +13 )$

Find the Y intercept of the graph.

just plug in x = 0 and solve

Quote:

Explain why there is no real solution to the equation f(x)=0
this is not true, f(-4) = 0, -4 is a real number

Quote:

Find the stationary points of y= f(x).
find f'(x) and set it equal to zero, use the product rule if you don't want to expand everything