Looks like 57: 12+9=21, +9=30, +9=39, +9=48, +9=57.
12 - 5(n-1)
The nth term of the sequence is expressed by the formula 8n - 4.
Here are the first five terms of a sequence. 12 19 26 33 40 Find an expression for the nth term of this sequence.
24 - 6n
Give the simple formula for the nth term of the following arithmetic sequence. Your answer will be of the form an + b.12, 16, 20, 24, 28, ...
12 - 5(n-1)
The nth term of the sequence is expressed by the formula 8n - 4.
The nth term is 5n-3 and so the next term will be 22
nth term is n squared plus three
Here are the first five terms of a sequence. 12 19 26 33 40 Find an expression for the nth term of this sequence.
5
24 - 6n
There is no pattern
Give the simple formula for the nth term of the following arithmetic sequence. Your answer will be of the form an + b.12, 16, 20, 24, 28, ...
The sequence has a difference of 10, so the nth term starts with 10n. Then to get to -8 from 10 you need to subtract 18. So the nth term is 10n - 18.
The nth term of the sequence -4 4 12 20 29 is 8n+12 because each time the sequence is adding 8 which is where the 8n comes from. Then you take 8 away from -4 and because a - and - equal a + the answer is 12. Which is where the 12 comes from. Hope I helped.
Clearly, if you omit the sign, the nth. term will be 4n. The alternating sign can easily be expressed as a power of (-1), so in summary, the nth. term is (-1)n4n.