Jawabanmu

2014-02-16T15:40:41+07:00
Kalau α=nβ maka rumusnya

n b^{2} =  (n+1)^{2} .ac

di soal diketahui α=2β jadi n=2, maka

2(m)^{2} = (2+1)^{2} (1)(18) \\  2m^{2} = 162 \\  m^{2} = 81 \\ m = 9
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