Question

How to solve f(x)=2x+1 when x=a-b?​

Answer 1

Do a u-substitution!

Let u = 2x-1.

Then x = (u+1)/2.

Substituting into f(2x-1) = x, we get f(u) = (u+1)/2.

Thus, f(2) = (2+1)/2 = 3/2.

Answer 2

Answer:f(2) = 3/2

Explanation:

Let u = 2x-1.

Then x = (u+1)/2.

Substituting into f(2x-1) = x, we get f(u) = (u+1)/2.

Thus, f(2) = (2+1)/2 = 3/2.