September 2018 1 21 Report
Jumlah n suku pertama suatu deret aritmetika dinyatakan dengan  S_{n} =  \frac{5}{2} n^{2} +  \frac{3}{2} n. Suku ke 10 deret aritmetika tersebut adalah....
A. 49
B. 47  \frac{1}{2}
C. 35
D. 33 \frac{1}{2}
E. 29

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