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Materi Notasi Sigma-3 - 1 + 1 + 3 + 5 + 7 + ... + 25
a = -3
b = -1 - (-3) = 2
Un = a + (n - 1)b
Un = -3 + (n - 1)2
Un = -3 + 2n - 2
Un = 2n - 5
25 = 2n - 5
30 = 2n
n = 15
Maka , -3 - 1 + 1 + 3 + ... + 25 Dapat Dinyatakn dalam :