Question

The explicit rule for a sequence and one of the specific terms is given. Find the position of the given

term.
f(n) = 1.25n+ 12.5; 25

25 is the BLANK th term

Answer 1

I think it’s 10.2 I looked it up

Answer 2

10.2

Explanation:

F(n) is basically a fancy substitute for y

25= 1.25n + 12.25

subtract 12.25 from both sides

12.75=1.25n

n=10.2

plug back in to double check

1.25(10.2) + 12.25

it equals 25, therefore the answer is

10.2