honors algebra 1

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if f(x)=2x and g(f(x))=x, find g(x)

  • honors algebra 1 -

    composition function
    g(f(x))
    so where ever you see x in the g(x) equation plug in f(x)
    so do the reverse
    g(x)= (1/2)x
    so when you check your work
    g(f(x))= (1/2(2x)) ----> the 1/2 and the 2 cancel and you are left with just x so it checks!

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