Operations+with+Functions

=**Operations with Functions**= Wednesday. September 21, 2011
 * Unit test on Monday September 26th Sections 1.1-1.7&4.2 Sample Test available**
 * One Hour Extra help availble on Sunday 9pm to 10pm through discussion**

Ex. Graph f(x) = x+2 and g(x) = -x+5 on the same graph Domain


 * When you add, subtract or multiply functions, you add, subtract and multiply the y-values for the same x-values.**

Sketch h(x) = f(x) x g(x)

if h(x) = g(x) - f(x) find h(-4)

h(x) = (-x+5) - (x+2) = -x+5-x-2 = -2x+3 h(-4) = -2(-4)+3 = 8+3 = 11

OR

g(-4) = -(-4)+5 = 9 f(-4) = (-4)+2 = -2 h(-4) = g(-4) - f(-4) = 9 - (-2) = 11