Question

@agent0smith

Answer 1

Hi

Answer 2

omfg yay okay. so i am doing arithmetic sequences rn and im having trouble with it. im not sure when to use recursive and explicit

Answer 3

Well it depends... it'd be easier with questions

Answer 4

so its the same thing? you can use either?

Answer 5

Yeah pretty much. You can always use recursive, but it's often easier to use explicit.

Answer 6

okay im gonna try and do this one on my own. so tell me if i mess up

Answer 7

You can't always use explicit though, not all recursives can be turned into explicit

Answer 8

Identify the 27th term of an arithmetic sequence where a1 = 38 and a17 = -74.

Answer 9

so \[a_n=a_1+d(n-1)\]

Answer 10

\[a_27=38+\].... what is d

Answer 11

You're finding d.

Answer 12

thats not what my paper is telling me

Answer 13

\[\large a_{27}=a_1+d(27-1)\]now just plug in a1 and a27

Answer 14

okay so a_1 is 38