Jika 3 log 7 =p, maka 49 log 21 =

^49log21
= ³log21/³log47
= ³log(3.7)/³log(7²)
= (³log3 + ³log7)/(2.³log7)
= (1 + p)/(2p)

49 log 21
*log 49 / * log 21
2 *log 7 / * log 7(3)
* = 3
2(3log 7) / 3 log 3 + p
2p / p + 1

hemm