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162 = 6 × r³.
162 = 6r³.
162/6 = r³.
27 = r³.
r = ³√27.
r = 3.
a = U2 : r.
a = 6 : 3.
a = 2.
Un = ar(^n - ¹)
U8 = 2(3)(^8 - ¹)
U8 = 2(3^7).
U8 = 2(2.187).
U8 = 4.374 (B).
lalu kerjakn suku yg ditny
smoga membantush_!
#jdkn best answer yaa :)