If f(x)=x2x, how do you find f(2x)?

1 Answer
Jun 13, 2016

4x22x

Explanation:

All that is required here is to substitute x = 2x into the right side in the same way that is done for a numeric value.

f(x)=x2x

f(2) means substitute x = 2

f(2)=222=42=2

In the same way:

f(2x)=(2x)2(2x)=4x22x