Question

In a geometric sequence, the 5th term is 9 and the 7th term is 36. Use the geometric

mean to find the 6th term.

Answer 1

18

Explanation:

you need to get from 9 to 36 in 2 steps by multiplying, so you need to find what gets 9 to 26 in one turn. 9*4=36, and because 4 is square we know you can multiply by 2 twice to get the same effect. 9*2=18. and just to make sure we can check that 18*2=36