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22-09-2017
Mathematics

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PLEASE HELP Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x

f(x) = (x+3)/4

g(x) = 4x - 3

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apologiabiology apologiabiology

22-09-2017

compose them with eachother

f(g(x))=(4x-3+3)/4=(4x+0)/4=4x/4=x
g(f(x))=4((x+3)/4)-3=(x+3)-3=x+3-3=x+0=x

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