suku ke-8 dari barisan 486,162,54...adalah...
a. 1/3
b.2/3
c. 2/9
d. 2
e. 6
a. 1/3
b.2/3
c. 2/9
d. 2
e. 6
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a=486
r=162/486=1/3
Un=ar^(n-1)
U8=486.(1/3)^7
U8=486/2187
U8=2/9 ✔️