Question

If you were asked to find the 87th term in a sequence, which formula would you want to be given?

Answer 1

To determine the nth term of sequence, first we need to know what type of sequence is it. It can be an arithmetic sequence or a geometric sequence. For an arithmetic sequence, the nth can be determined by the formula,

an = a1 + (n-1)d

For a geometric sequence, 

an = a1r^n-1

Hope this answers the question.