Question

if
`a_(1)`=10 and
`a_(n)`=
`2a_(n-1)` then find the value of
`a_(5)`

Answer 1

a₅ = 160

Explanation:

Using the recursive rule and a₁ = 10 , then

a₂ = 2a₁ = 2 × 10 = 20

a₃ = 2a₂ = 2 × 20 = 40

a₄ = 2a₃ = 2 × 40 = 80

a₅ = 2a₄ = 2 × 80 = 160