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Jawabannya C. 27.000Diketahui : U1 =4.000 ; b=200
Ditanya : S6?
Penyelesaian :
Sn = n/2 x (2a + (n – 1)b)
S6 = 6/2 x (2x4.000 + (6-1) x 200)
S6 = 6/2 x (8.000 + 1.000)
S6 = 6/2 x (9000)
S6 = 27.000