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Verified answer
Deret Aritmatika5 + 7 + 9 + ... + Un = 192
a = 5
b = U2 - U1 = 7 - 5 = 2
Sn = (n/2)(2a + (n - 1)b)
192 × 2 = n(2.5 + (n - 1)(2))
384 = n(2n + 8)
2n² + 8n - 384 = 0
n² + 4n - 192 = 0
(n - 12)(n + 16) = 0
n = 12
Jadi, banyk suku spy deret berjumlah 192 = n = 12