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Verified answer
Jawabbarisan 4,7,10, 13,...,136
barisan aritmetika
4 = a
7-4 = b
b = 3
Un = a + (n-1)b
136 = 4 +(n-1) 3
136 = 4 + 3n - 3
136 = 3n + 1
3n = 135
n = 45