dik f(x)=2-2x/x+3, h(x)= 2-5x ,tentukan (foh)(2x+4)

foh(x) = f(h(x)) = f(2-5x) = 2-2(2-5x)/(2-5x)+3 =2-(4-10x)/5-5x=2-4+10x/5-5x
           = -2+10x/5-5x
foh(2x+4) = -2+10(2x+4) / 5-5(2x+4) =-2+20x+40/5-10x-20=38+20x/-15-10x

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