Question

Someone pls help me asapppp

Answer 1

`a_(n)` = 3
`a_(n-1)` : a₁ = 7

Explanation:

a recursive formula allows a term in the sequence to be found from the preceding term.

the sequence here has a common ratio between consecutive terms

`(21)/(7)` =
`(63)/(21)` = 3

thus to find a term in the sequence multiply the previous term by 3, that is

`a_(n)` = 3
`a_(n-1)` : first term a₁ = 7