jorden nzante
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The first term of a sequence is 13
The term to term rule is “take away 6”

Work out the 4th term


Anyone got any Ideas?
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papie
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its an arithmetic sequence , use the formula an=a1 + (n-1)d
where an=nth term
a1= 1st term
n=number of terms
d=common difference
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username5228528
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1). 13=19-6
2). 7=13-6
3). 1=7-6
4). -5=1-6
I’m just subtracting 6 from the previous answer.

Not sure if it’s right, I’m horrible at maths!
Last edited by username5228528; 7 months ago
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Prince Philip
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(Original post by jorden nzante)
The first term of a sequence is 13
The term to term rule is “take away 6”

Work out the 4th term


Anyone got any Ideas?
If the term to term rule is "take away 6" then you just have to take away 6 to get the next term. So

1st term = 13
2nd term = 7

What's the 3rd term and 4th term?
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Prince Philip
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(Original post by papie)
its an arithmetic sequence , use the formula an=a1 + (n-1)d
where an=nth term
a1= 1st term
n=number of terms
d=common difference
There's no need for a formula for a simple example like this. My guess is this is pre-A Level and maybe pre-GCSE.
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papie
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(Original post by Sir Cumference)
There's no need for a formula for a simple example like this. My guess is this is pre-A Level and maybe pre-GCSE.
ye i only stated it because you need it for more complicated questions
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Prince Philip
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(Original post by papie)
ye i only stated it because you need it for more complicated questions
I understand. I just said it because it's possible that a formula could confuse them depending on their level.
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Anonymous #1
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not really relevant to the health board
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