jika 3log 4 = a dan 7log 3 = b 14 log 84 adalah ??

[tex]^3log 4 = a \\ ^7log 3 = b \\ ^{14}log 84 = \frac{^3log 84}{^3log 14} \\ = \frac{^3log 4 + ^3log 3 + ^3log 7}{^3log 2 + ^3log 7} \\ = \frac{a + 1 + \frac{1}{b} }{2a + \frac{1}{b} } \\ = \frac{ab + b + 1}{2ab + 1} [/tex]