The nth term

HOME

Math Central

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

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.