Jawabanmu

Jawaban paling cerdas!
2014-02-08T20:44:54+07:00
U2= 9, U5= 243
U5/U2 = 243/9
ar⁴/ar = 243/9
r³ = 27
r = 3

U2 = ar
9 = a.3
a = 9/3 = 3

Un = ar^n-1
     = 3.3^n-1
1 5 1