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Un = 4n - 13.
The rule is 5 10 15 20 25 30 .... etc and accordingly the next number in the sequence will be 106
4
The nth term of the sequence is 2n + 1.
an = an-1 + d term ar-1 = 11 difference d = -11 ar = ar-1 + d = 11 - 11 = 0 The term 0 follows the term 11.