Question

Let $f(x)=2^{x}$,then the value of $x$ satisfying the equation $f(x-2)=f(x)-2$ is equal to$M-log_{_2} M$.Then the value of M is

Answer 1

Let $f(x)=2^{x}$,then the value of $x$ satisfying the equation $f(x-2)=f(x)-2$ is equal to$M-log_{_2} M$.Then the value of M is