Day 3 ­ Add, Subtract, Multiply and Divide functions.notebook
October 20, 2014
Objective: 6.3 Perform operations with functions. (add, subtract,
multiply, & divide) (A.1.B.)
Find the domain of each function. (A.1.B.)
f(x) is read " f of x" , which means you are given the function (y=) at point x.
This represents the dependent variable of the function-- a relation where
each input has exactly one output.
3
2
Let f(x) = -2x + 5 and g(x) = x +2 and h(x) = x - 8
Perform the indicated operations and find the domain of the
function. State the domain in set builder notation for #1-3
1) g(x) f(x)=
2) f(x) - g(x)
3) h(x)
g(x)
1
Day 3 ­ Add, Subtract, Multiply and Divide functions.notebook
October 20, 2014
3-8
2
h(x)
=
x
f(x) = -2x + 5 and g(x)2 = x +2 and
3
Let f(x) = -2x + 5 and g(x) = x +2 and h(x) = x - 8
4) f(-2) h(-1)
5) f(3) - g(-1)
6). g(3x-1)
2
Day 3 ­ Add, Subtract, Multiply and Divide functions.notebook
October 20, 2014
Let f(x) = 4x2 and g(x) = 5x - 2 Perform the indicated operation and find the domain.
State the domain in interval notation for #7-10.
7) f(x) + g(x)
8) f(x)
g(x)
9) f(x) - g(x)
3
Day 3 ­ Add, Subtract, Multiply and Divide functions.notebook
October 20, 2014
9
2
Recall: f(x) = 4x and g(x) = 5x - 2 Remember to perform the indicated operation
and find the domain (#9 only for domain)
10) g(x)
f(x)
11) f(1)*g(-4)
12) f(-2)
g(1)
4
Day 3 ­ Add, Subtract, Multiply and Divide functions.notebook
October 20, 2014
2
f(x) = 4x and g(x) = 5x - 2
Let f(x) = 4x2 and g(x) = 5x - 2 Perform the indicated operation and find the domain.
13) f(4) + g(-2)
14) g(3)
f(2)
5
Day 3 ­ Add, Subtract, Multiply and Divide functions.notebook
October 20, 2014
6