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Suppose f(x) is an invertible function, and suppose that f(2)=f^{-1}(2)=4. What is the value of f(f(2))?

 Nov 7, 2019
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Suppose f(x) is an invertible function, and suppose that f(2)=f^{-1}(2)=4. What is the value of f(f(2))?

 

We know that   f (2)   =  4

 

So  f(f(2))   =   f(4)

 

If f-1(2)  = 4      then    f(4)    =  2

 

So

 

f(f(2))  = f(4)   =   2 

 

 

cool cool cool

 Nov 7, 2019

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