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14 = a + 2b
U6 = a + 5b
16 = a + 5b
16 = a + 5b
14 = a + 2b _
2 = 3b
2/3 = b
a + 5b = 16
a + 10/3 = 16
3a + 10 = 48
3a = 38
a = 12 2/3
u 3=> a+ 2b = 14 _
3b = 2
b = 2/3
a + 2b = 14
a + 2(2/3) = 14
a + 4/3 = 14
a = 14- 4/3
a = 38/3
maka
U27 = a+ (n-1)b
= 38/3+ (27-1)2/3
= 38/3 + 26 x 2/3
= 38/3 + 52/3
= 90/3
= 30