Question

Given the functions f(n) = 25 and g(n) = 3(n − 1), combine them to create an arithmetic sequence, an, and solve for the 12th term.

Answer 1

@ivettef365

Answer 2

an = 25 − 3(n − 1); a12 = −11

an = 25 − 3(n − 1); a12 = −8

an = 25 + 3(n − 1); a12 = 58

an = 25 + 3(n − 1); a12 = 61

Answer 3

@ivettef365

Answer 4

@satellite73

Answer 5

If I have to guess I would go for the 3rd option

Answer 6

thanksss :)

Answer 7

Given an arithmetic sequence in the table below, create the explicit formula and list any restrictions to the domain.

Answer 8

ok, on 4, you have that term 1 = 40, the other terms are greater
so n>=40

Answer 9

now if you plug term 2, on option 1which is
an = 40 + 7(n − 1) let see if it works, term 2
40 + 7(2-1)
40 + 7(1)
40 + 7 = 47 that is correct term 2 is 47

Answer 10

did you understand ?

Answer 11

ohh ok

Answer 12

So the full answer would then be an = 40 + 7(n − 1) where n ≥ 1 (just took the test!).
:)
Points earned on this question: 2