The first term of a G.P is 7 while the common ratio is 5, find the 11th term
a_11 = ar^10 = 7 * 5^10
The n-th term of GP:
an = a1 ∙ rⁿ ⁻ ¹
In this case a1 = 7 , r = 5 , n = 11
a11 = 7 ∙ 5¹¹ ⁻ ¹ = 7 ∙ 5¹⁰ = 7 ∙ 9 765 625 = 68 359 375
an = a1 ∙ rⁿ ⁻ ¹
In this case a1 = 7 , r = 5 , n = 11
a11 = 7 ∙ 5¹¹ ⁻ ¹ = 7 ∙ 5¹⁰ = 7 ∙ 9 765 625 = 68 359 375