Which of the following is the term a9?

Question

Given an arithmetic sequence with a1 = 24 and a common difference of d = negative-6, which of the following is the term a9?

Answer 1

 

 Hi Kyee

The nth term in AP is 

a_n = a₁ +(n - 1 ) d

Where  a₁ = = 24 and

  d = - 6 

 a₉ = 24 + ( 9 - 1) ( -6)

   = -24