geometric mean (1 Viewer)

[enigma_1]

how do u do c onwards?
Like how do you show it? There's no guidance

 

[gosfa747]

use the hint from c

 

[asianese]

What is the condition for 3 numbers to be in a GP? Use this to solve for d.

 

[RealiseNothing]

The AM is just the average of two terms. I'll do (d) as an example.

What you have to do for these questions is "set up" the expressions yourself. So let the first term be and the 7th term be. Then the average, or AM, of these two terms is:



And we know that is just the 4th term.