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Barisan dan DeretKelipatan 4 antara 100 dan 200
104, 108, 112, ..., 196
Un = U1 + (n - 1) b
196 = 104 + (n - 1) 4
196 = 104 + 4n - 4
196 = 4n + 100
196 - 100 = 4n
96 = 4n
n = 96/4
n = 24
Sn = n/2 (U1 + Un)
S24 = 24/2 (104 + 196)
S24 = 12 x 300
S24 = 3600
Jadi, jumlah bilangan kelipatan 4 antara 100 dan 200 adalah 3600.
*semoga membantu. sukses selalu ^_^