Rumus suku ke n = arn-1
Rumus suku ke 2
3=ar
Rumus suku ke 4
27=ar3
Keduanya dibagikan
27/3=ar3/ar
9=r2
R=3
3=3a
A=1
Rumus suku ke 7
N7= ar6
N7= 1.36
N7=729
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u4.... ar³ =27
ar³/ar = 27/3
r² = 9
r = 3
ar = 3
a = 3/r
a = 3/3 = 1
u7..... a r^6 = 1 x 3^6
= 729
Rumus suku ke n = arn-1
Rumus suku ke 2
3=ar
Rumus suku ke 4
27=ar3
Keduanya dibagikan
27/3=ar3/ar
9=r2
R=3
3=ar
3=3a
A=1
Rumus suku ke 7
N7= ar6
N7= 1.36
N7=729