Question

I'm doing Arithmetic Sequence and I need help.
The first term of an arithmetic sequence is 42. The rule an = an-1 + 8 can be used to find the next term of the sequence.
Explain how to write the explicit rule for the arithmetic sequence from the given information.
I just need help setting it up.

Answer 1

Wait wait, wouldn't you just add 8? Or would you subtract it?

Answer 2

you would add 8

Answer 3

explicit formula
\[a_n = a_1 + d(n-1)\]
a1 = 42
d = 8

Answer 4

So an-1 = 42? So it would look like an = 42 + 8

Answer 5

Well really an = 42 (n - 1)8