Jawaban:
A. 2760
B. -1905
C. 2685
Penjelasan dengan langkah-langkah:
Pakai rumus
Sn = n/2 [2a + (n-1) . b]
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Jawaban:
A. 2760
B. -1905
C. 2685
Penjelasan dengan langkah-langkah:
Pakai rumus
Sn = n/2 [2a + (n-1) . b]