Question

Ivan write a sequence with the rule add by 5 if he start at -9 what will be the 7th term of the sequence

Answer 1

a₇ = 21

Explanation:

the nth term of an arithmetic sequence is

`a_(n)` = a₁ + d(n - 1)

a₁ is the first term , d the common difference , n is the term number

here a₁ = - 9 , d = 5 and n = 7 , then

a₇ = - 9 + (5 × 6) = - 9 + 30 = 21