Find the nth Geometric Sequence Term
A geometric sequence goes from one term to the next by always multiplying (or dividing) by the same value. (common ratio r)
an=a1r(n-1)
  • n is the position of the term in the sequence
  • a is the first number in the set (the starting number)
  • r is the common ratio (the value multiplying or )

Find the 7th term of the geormetic sequence starting at 3 and being multiplied by 2:

an=a1r(n-1)  becomes   37=312(7-1)
a = 1(n-1)



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©Jeff LeMieux, revised 2/2014