f((x1+x2)/2)) = 2^((x1+x2)/2)
[f(x1) + f(x2)]/2= [(2^x1)+(2^x2)]/2
> √[(2^x1)(2^x2)] ( AM> GM)
= (2^(x1+x2))^(1/2)
= 2^[(x1+x2)/2]
= f((x1+x2)/2)) #
f((x1+x2)/2)) = 2^((x1+x2)/2)
[f(x1) + f(x2)]/2= [(2^x1)+(2^x2)]/2
> √[(2^x1)(2^x2)] ( AM> GM)
= (2^(x1+x2))^(1/2)
= 2^[(x1+x2)/2]
= f((x1+x2)/2)) #