If the inverse function image of F (x) = logm (x) passes (2, n), then the minimum value of N-M is

If the inverse function image of F (x) = logm (x) passes (2, n), then the minimum value of N-M is

logm n=2 m^2=n
n-m=m^2-m=(m-1/2)^2-1/4
So the minimum is - 1 / 4