Question 881845
 {{{f(x) = 2^x}}}
{{{f(x-2)=2^(x-2)=2^(-2)2^x=2^x/2^2=2^x/4}}}
{{{f(x+4)=2^(x+4)=2^4*2^x=16*2^x}}}
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{{{f(x+4)-f(x-2)=16*2^x-2^x/4}}}
{{{f(x+4)-f(x-2)=(16-1/4)2^x}}}
{{{f(x+4)-f(x-2)=(64/4-1/4)2^x}}}
{{{f(x+4)-f(x-2)=(63/4)*2^x}}}
{{{f(x+4)-f(x-2)=(63/4)*f(x)}}}