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Un = ar^(n-1) a= 1/2 dengan r = 2
U1 = 1/2 rumus = a
U2 = 1/2 r^(2-1) = 1 rumus = ar^1
= 1/2 r = 1
= r = 2
U3 = 1/2 r^3-1 = 2 rumus = ar^2
= 1/2r^2 =2
= r^2 = 4
= r = 2
U4 = 1/2 r^4-1 = 4 rumus = ar^3
= r^3 = 8
= r =2
U5 = 1/2 r^5-1 = 8 rumus = ar^4
= r^4 = 16
= r = 2
Semoga membantu :) D