October 28, 2014
.
. Precalc Warm Up # 9-2
Get a grapher for today's quiz.
Graph and state the domain and range
1. y = x2 - 10x + 28, x>4
3. f(x) = 2x + 1
2. x2 + y2 - 6x + 4y + 11 = 0
g(x) = x2
find the composite and state domain and range
a. f(g(x))
b. g(f(x))
October 28, 2014
HW Questions?
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More work with composites
Remember that in f(g(x)), g(x) is applied first.
g(x) also determines the domain.
range of g ⊆ domain of f
otherwise, f(g(x)) doesn't exist
October 28, 2014
Ex: find f(g(x)) and g(f(x)) and state the dom and range
f(x) = √x - 1
find f(g(-1))
g(x) = 2 - x
find g(f(10))
October 28, 2014
Solve the equation f(g(x)) = 0
where f(x) = x + 3 and g(x) = x2 - 7
October 28, 2014
#9-2 SL book
p. 154 3RC, 4, 5,7,9 7b is wrong in back
Clear your desk
for the quiz. You
need to use my
grapher.
HW Quiz is tomorrow