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²log 7 = n
⁴² log 252 = ²log 252 : ²log 42
= ²log 2². 3² . 7 : ²log 2.3.7
= ²log 2² + ²log 3² + ²log 7 : ²log 2 + ²log 3 + ²log 7
= 2 + 2/m + n : 1 + 1/m + n
= 2m + mn + 2 / m : m + mn + 1 / m
= 2m + mn + 2 / m x m / m + mn + 1
= 2m + mn + 2 / m + mn + 1
^2 log 3 = 1/m
^2 log 7 = n
^42 log 252 = ?
dapat diubah menjadi = > (^2 log 252) / (^2 log 42)
(^2 log 3.3.2.2.7) / (^2 log 3.2.7)
= (^2log3 + ^2log3 + 1 + 1 + ^2log7) / (^2log3 + 1 + ^2log7)
= (1/m + 1/m + 2 + n) / (1/m + 1 + n)
= [(2n + 2mn + m) / mn] / [(n + mn + m) / mn]
= (2n + 2mn + m) / (n + mn + m)