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◾ Materi : Barisan dan Deret◾ Sub materi : Deret
◾ Mapel : Matematika
◾ Keyword : Deret, Aritmatika
Jawab :
-98, -95, -92, -89 , ...
a = -98
b = 3
S50 = 50/2 (2(-98) + (50-1)3)
S50 = 25 (-196 + 147)
S50 = 25 ( -49 )
S50 = -1225
Jawaban : B
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