Help with nth term and number sequence
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Help with nth term and number sequence
Hi
Can anyone advise on the best way to tackle the following questions?
a. 3 5 7 9 11 13. nth term = ?
b. 7 11 15 19 23 27. nth term = ?
The answers are:
a. 2n+1
b. 4n+3
Any suggestions on how to approach these sorts of questions? Or online resources to teach DD how to approach them?
Thanks!
Can anyone advise on the best way to tackle the following questions?
a. 3 5 7 9 11 13. nth term = ?
b. 7 11 15 19 23 27. nth term = ?
The answers are:
a. 2n+1
b. 4n+3
Any suggestions on how to approach these sorts of questions? Or online resources to teach DD how to approach them?
Thanks!
Re: Help with nth term and number sequence
The generic formula is an+bexam2019 wrote:Hi
a. 3 5 7 9 11 13. nth term = ?
The step between the prev and next numbers is 2, that means a=2, i.e. 2n+b
Then you can figure out the value of b:
2n+b=3, where n=1
Re: Help with nth term and number sequence
Thank you!