September 2018 1 282 Report
Pada deret geometri diketahui U2=24 dan U5=648. rumus jumlah n suku pertama adalah
a. Sn=2(5n-1)
b. Sn4(4n)
c. Sn=1/2(3n-1)
d. Sn=3(4n-1)
e. Sn= 4(3n-1)

(dengan caranya)
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