Consider the given recursive function of an arithmetic sequence. f(1)=4 f(n)=f(n-1) +7, for n=2,3, what is the 8th term of the sequence? a. 60 b. 53 c. 46 d. 67

Method 1:

Method 2:

The general formula of an arithmetic sequence:

We have:

Substitute:

Put n = 8 to the formula:

- both graphs increase on their domain.

- the graphs of both functions have the same x-intercept.

- neither graph has a y-intercept.