x=1/4,y=1/6;
8*(1-2x)/(1-x+y)
=8*[1-2*(1/4)]/[1-(1/2)+(1/6)]
=8*(1/2)/(2/3)
=8/3
x=1/4,y=1/6;
8*(1-2x)/(1-x+y)
=8*[1-2*(1/4)]/[1-(1/2)+(1/6)]
=8*(1/2)/(2/3)
=8/3
x=1/4.y=1/6
8^(1-2x)/(1-x+y)
=8^[1-2*(1/4)]/{1-(1/4)+(1/6)]
=8^(1/2)/(2/3)
=8/3
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