If the 3 number n-4,n,n+5 are G.P find the value of n and the next 2 terms after n+5

Answer 1

since there is a common ratio,
n^2 = (n-4)(n+5)
n = 20
So r = 5/4, and the GP is
16, 20, 25, 125/4, 625/16, ...