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Verified answer
A = 6a + (7-1)b = 36
6 + 6b = 36
6b = 36 - 6
6b = 30
b = 5
6,11,16,21,26,31,36
rumus suku ke 7
U7 = a + 6.5
= 6 + 6.5
= 6 + 30
= 36
maaf kalo salah