Math Is Fun Forum

lisathedork

Member

Registered: 2013-10-24

Posts: 36

Arithmetic Sequence

Hello can someone help me with this one problem?

Given the Arithmetic sequence A1, A2, A3, A4

50, 60, 70, 80

What is the value of A29?

Can I get any notes on how to do this?

Please provide links also, thanks again.

evene

Member

Registered: 2015-10-18

Posts: 272

Re: Arithmetic Sequence

I'm not that great with Arithmetic Sequences, so correct me if I'm wrong!

Using the formula

, we get:

Last edited by evene (2015-11-15 09:14:21)

evene

Member

Registered: 2015-10-18

Posts: 272

Re: Arithmetic Sequence

is the common difference. The difference between the 2 numbers. So from 50 to 60, the difference is 10. From 60 to 70, the difference is 10. And so on...

lisathedork

Member

Registered: 2013-10-24

Posts: 36

Re: Arithmetic Sequence

Wow, I didn't know it was that easy!

Thank you so much for the help, I did the other problems with no trouble.

evene

Member

Registered: 2015-10-18

Posts: 272

Re: Arithmetic Sequence

Ok, no problem!

Last edited by evene (2015-11-16 12:41:15)