Question

write a recursive formula for an, the nth term of the sequence 20,25,30,35 a1= an=

Answer 1

To find the recursive formula for this sequence, we need to express each term (an) in terms of the previous term (an-1).

From the given sequence, we can observe that each term is obtained by adding 5 to the previous term. Therefore, the recursive formula for this sequence is:

an = an-1 + 5

Substituting a1 into the formula, we have:

a1 = 20

So, the recursive formula for this sequence is:

an = an-1 + 5, where a1 = 20