A geometric sequence increase or decrease by a common factor -
the common ratio.
The common ratio is 2. We can write this as an algebraic
Where an is the first number (in this case 2).
r is the common factor (in this case 2).
n is the place in the set the number has (2 has n = 1, 8 has n =
We can rewrite this formula for our specific sequence:
If we would like to know the next number in the sequence after
32. The next number in the sequence is the 6th number.
This gives us:
Video lesson: Find the eighth number