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Brooke2013

  • 3 years ago

Let f(x) = 4 + 5x and g(x) = 2x - 1. Find f(g(x)) and g(f(x)) Choices:) A.) f(g(x)) = 10x - 1; g(f(x)) = 10x + 7 B.) f(g(x)) = 7x + 3; g(f(x)) = 10x + 7 C.) f(g(x)) = -7x - 3; g(f(x)) = -10x + 7 D.) f(g(x)) = -10x - 7; g(f(x)) = 7x + 3

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  1. zepdrix
    • 3 years ago
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    |dw:1353200255175:dw|

  2. zepdrix
    • 3 years ago
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    Understand the pattern? It's important to get comfortable with function notation c:

  3. gursu
    • 3 years ago
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    When you want to find f(g(x)) you take the g(x) function and plug it in for every x value in function f(x). So, f(g(x)) will be 4+5(2x-1)=4+10x-5=10x-1. You do the same thing for g(f(x)) and you will find 10x+7

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