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

a_n = 40 + 7(n − 1) where n ≥ 40

a_n = 40 + 7(n − 1) where n ≥ 1

a_n = 40 − 7(n − 1) where n ≥ 40

a_n = 40 − 7(n − 1) where n ≥ 1

Question

help please Given an arithmetic sequence in the table below, create the explicit formula and list any restrictions to the domain.

a_n = 40 + 7(n − 1) where n ≥ 40 

a_n = 40 + 7(n − 1) where n ≥ 1 

a_n = 40 − 7(n − 1) where n ≥ 40 

a_n = 40 − 7(n − 1) where n ≥ 1

anonymous · Answer

n   a_n
1   40
2   47
3   54

anonymous · Answer

a_n = 40 + 7(n − 1) where n ≥ 1

anonymous · Answer

why xo?

anonymous · Answer

how did you get that and because it was my email so they made that myuser

anonymous · Answer

the table is

n   a_n
1   40
2   47
3   54

the domain is the values for "n"
notice that they start from 1 upwards, hence we say n>=1

correct?

anonymous · Answer

you are given 4 answers, which of them matches the a_n values from the table above?

anonymous · Answer

Okay but how do you know the +7 part sorry I'm not good at this part of math

anonymous · Answer

oh +7 is how much it goes up

anonymous · Answer

when n = 1 the series is 40
and a_1 = 40 + 7(1 − 1) = 40
and so on for the remaining terms 2, 3, 4, ...
xo