-4n + 24
#1 ; -4(1) +24 = 20
#2 ; -4(2) + 24 = 16
#3 ; =4(3) + 24 = 12
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20-9x=n
Un = 29 - 9n
They are: nth term = 6n-4 and the 14th term is 80
560
The given sequence is 11, 31, 51, 72 The nth term of this sequence can be expressed as an = 11 + (n - 1) × 20 Therefore, the nth term is 11 + (n - 1) × 20, where n is the position of the term in the sequence.