Question

Find the recursive formula for the arithmetic sequence 7, 5, 3, 1, -1, ... (1 point)

@1=7,an=@n-1+2

O a1=7,an=an-1-2

O a1=7,an=2an-1

O a1=7,an =- 2an-1

Answer 1

a1 = 7, an = a_{n-1} - 2 for n ≥ 2

(Each term is 2 less than the previous term.)