Split - Geometric mean

[mollymvora]

When it says insert 3 geometric means between 5 and 80.
Because the rate is +/- 2 can you have two different sequences that can work?
Also what is the (k+1)st term when doing the general binomial expansion? It says the (k+1)st term of (a+b)^n is ...... What does it mean (k+1)st?
when it says first ten powers of 5
is that 5^0, 5^1, 5^2 .....
or is it 5^1, 5^2, 5^3.......

 

[tkhunny]

Geometric: The rate is NOT +/- anything. Moving from 5 to 80 requires + something.

Binomial: In (a+b)^n there are n+1 terms. If k < n, the kth term is any term in the expansion. The (k+1)th term is just the next one.