Solving an Equation for an Unknown Function Suppose that g ( x ) = 2 x + 1 h ( x ) = 4 x 2 + 4 x + 7 Find a function f such that f ○ g = h . (Think about what operations you would have to perform on the formula for g to end up with the formula for h .) Now suppose that f ( x ) = 3 x + 5 h ( x ) = 3 x 2 + 3 x + 2 Use the same sort of reasoning to find a function g such that f ○ g = h .
Solving an Equation for an Unknown Function Suppose that g ( x ) = 2 x + 1 h ( x ) = 4 x 2 + 4 x + 7 Find a function f such that f ○ g = h . (Think about what operations you would have to perform on the formula for g to end up with the formula for h .) Now suppose that f ( x ) = 3 x + 5 h ( x ) = 3 x 2 + 3 x + 2 Use the same sort of reasoning to find a function g such that f ○ g = h .
Solution Summary: The author evaluates the value of function f for first and second sets of equations. They then substitute 2x+1 and 4x2+4x+7 for the above expression.
Solving an Equation for an Unknown Function Suppose that
g
(
x
)
=
2
x
+
1
h
(
x
)
=
4
x
2
+
4
x
+
7
Find a function f such that f ○ g = h. (Think about what operations you would have to perform on the formula for g to end up with the formula for h.) Now suppose that
f
(
x
)
=
3
x
+
5
h
(
x
)
=
3
x
2
+
3
x
+
2
Use the same sort of reasoning to find a function g such that f ○ g = h.
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