The explicit formula of an arithmetic sequence is an= –12 + (n – 1)5. Write the recursive formula using the formand then write the first 4 terms of the sequence.

1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.