What is the recursive formula for the sequence 8, 10, 12.5, 15.625, …?

Question

answers

1. A.a_n = 8(1.25)^n – 1

1. B.a_n = 1/8(1.25)^{n – 1}

1. C.a_n = 1.25(a_{n – 1}); a₁ = 8

1. D.a_n = 1.25( a_{n – 1}); a₁ = 1/8

Answer 1

a₁ = 8

a₂ = 10 = 1.25(8) = 1.25a₁

a₃ = 12.5 = 1.25(10) = 1.25a₂ , etc

So, the answer is C

Answer 2

x+x/4.....................