Question

If an=an-1 +4 and a5 =12 what is a7?

A) 16
B) 20
C) 24
D) 28

Answer 1

Using the recursive formula given, a7 is calculated by finding a6 first and then adding 4 to get a result of 20 for a7, corresponding to option B).

Step-by-step explanation:

To find the term a7 when given that an=an-1 +4 and a5 =12, we need to use the recursive formula to find the subsequent terms. Since we know a5, we can calculate:

a6 = a5 + 4 = 12 + 4 = 16

a7 = a6 + 4 = 16 + 4 = 20

So the value of a7 would be 20, which corresponds to option B).