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Let f(x)=2x-3 For what value of x is (f(f(x)) = x?

 Jan 4, 2021

Best Answer 

 #1
avatar+112009 
+3

Let f(x)=2x-3 For what value of x is (f(f(x)) = x?

 

\(f(x)=2x-3\\ so\\ f(f(x))=2(2x-3)-3\\ \text{so when does}\\ 2(2x-3)-3=x \)

 

well you will have to solve it to find out ;)

 Jan 4, 2021
 #1
avatar+112009 
+3
Best Answer

Let f(x)=2x-3 For what value of x is (f(f(x)) = x?

 

\(f(x)=2x-3\\ so\\ f(f(x))=2(2x-3)-3\\ \text{so when does}\\ 2(2x-3)-3=x \)

 

well you will have to solve it to find out ;)

Melody Jan 4, 2021
 #2
avatar+57 
+2

The Answer is 3!

Thank You!

JoLink  Jan 4, 2021

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