Question

MEDAL & FAN ANYBODY ?
Calculate the geometric mean of 3 and 9.

Answer 1

So, a1=3 and a3=9 and you are missing a2.
\(\large\color{black}{ a_1\times r^{3-1}=a_3}\)
\(\large\color{black}{ 3\times r^{2}=9}\)

Solve for r.

Answer 2

I really want to say though, that you will have to answers for a2 (the messing geometric mean)

Answer 3

sqrt(3*9)=3root 3

Answer 4

excuse my grammar