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ar^2 = 2
a. 3^2 = 2
9a = 2
a = 2/9
u6 = 54
ar^5 = 54
ar^2 . r^3 = 54
2 r^3 = 54
r^3 = 27
r = 3
u4= ar^3
2/9 . 3^3
2/9 . 27 = 6
u6 = ar^5 = 54
ar^5 = 54
ar^2 x r^3 = 54
2 x r^3 = 54
r^3 = 54/2
r^3 = 27
r = 3
a x r^2 = 2
a x 3^2 = 2
a x 9 = 2
a = 2/9
u4 = a x r^3
= 2/9 x 3^3
= 2/9 x 27
= 6
ket : tanda '^' berarti pangkat