GS = a rⁿ ⁻ ¹
t₁ = 7, a = 7
t₉ = 45927 ar⁹ ⁻ ¹ = ar⁸ = 45927
a = 7 ........(a)
ar⁸ = 45927...........(b)
Equation (b) ÷ (a)
ar⁸/a = 45927/7
r⁸ = 6561
Take the eight root of both sides
⁸√r⁸ = ⁸√6561
r = 3
Sixth term = ar⁶ ⁻ ¹ = ar⁵ = 7*3⁵ = 1701
Sixth term = 1701