Question

What is the recursive rule for an=3n+5

a. a1=5;an=an−1+3

b. a1=8;an=an−1+5

c. a1=3;an=an−1+5

d. a1=8;an=an−1+3

Answer 1

D. a1=8;an=an-1+3

Step-by-step explanation:

just took a test with the same problem and got it right.

hope this helps

Answer 2

Option d is correct.

Step-by-step explanation:

We have given a formula
`a_n=3n+5`

We will put different values of n so, as to get
`a_n`

from the given formula

When n =1 we get

`a_1=3(1)+5=8`

When n=2 we get

`a_2=3(2)+5=11`

When n=3 we get

`a_3=3(3)+5=14`

We can see that next term is 3 more than the previous term

Hence,
`a_1=8;a_n=a_(n-1)+3`

Therefore, Option d is correct.