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Find the nth term for 9,11,13,15?

Question asked by: knowitall

Looking at the sequence, we know that there is an increase in two as you move along the series.

This means that the formula you are looking for is going to have 2n in it somewhere.

Now, simply try a few numbers until you get the one that fits the sequence. Look at the first term: 2n is 2 x1 = 2; and the series starts with 9, therefore we add 7.

Repeat across series: it works

Therefore the nth term has formula: 2n + 7

By: Unknown
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