shorty9358 shorty9358

27-08-2017
Mathematics

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Find the inverse function of f informally.verify that f(f-1(x))=x and f-1(f(x))=x

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ghanami ghanami

27-08-2017

hello :
f(x) = 3x f-1(x) = x/3
f(f-1(x)) = f(x/3) = 3(x/3) = x
f-1(f(x)) = f-1(3x= 3x/3=x

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