How do you find the first four terms of the geometric sequence for which a1=4 and r=3?
If the first term is 4 and the common ratio (r) is 3, t
If the first term is 4 and the common ratio (r) is 3, then the second term must be 3 times the first time, since a geometric series is a repeated multiplication. Alternatively, you can use the formula for the nth of a geometric series, which will benefit when you're dealing with very large numbers such as finding
The following solution solves this problem using the formula:
The 4th term is 108, and by logical deduction the 3rd term is 36, the second term 12 and the first term 4.