Diketahui 3log2=p, maka 8log81 adalah

³log 2 = p
²log 3 = 1/p

[tex]8_{log}81 = 2^{3}_{log}3^{4} = \frac{4}{3} [/tex]²log 3 = [tex] \frac{4}{3}. \frac{1}{p}= \frac{4}{3p} [/tex]