Math CentralQuandaries & Queries


Subject: Finding the Nth term
Name: Lisa
Who are you: Student

Hi, I am really stuck on another question too.
I have worked out that the nth term for 1, 4, 9, 16 is n squared and 3, 5, 7, 9 is 2n - 1, so what is the rule for the sequence 1x3, 4x5, 9x7, 16x9 ?
Thanks a million,

Look at 16 x 9 for example; from what you've told us already the 16 is 42 and the 9 is 2 x 5-1 so this term is
42 x (2 x 5-1). The next term would be 52 x (2 x 6-1). Do you see the pattern?


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