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1. Hello, can anyone help me ? I have been doing table patterns and the sequence is as follows 10,40,90,160,250
30 50 70 90
20 20 20

nth term =dn+(a-d)
= 10n+0
= 10n is this right?

and

a+(n-1)+half(n-1)(n-2)c
10+(n-1)30+half(n-1)(n-2)20
10+30n-30+10(n-1)(n-2)20 this is as far as i can get

thank you,

Gina Ps I can help with a level english,psychology and physiology
2. (Original post by gina94)
Hello, can anyone help me ? I have been doing table patterns and the sequence is as follows 10,40,90,160,250
30 50 70 90
20 20 20

nth term =dn+(a-d)

and

a+(n-1)+half(n-1)(n-2)c

thank you,

Gina
well basically for the nth term, it's just 10n^2 yes?

does that help?
3. (Original post by 4Ed)
well basically for the nth term, it's just 10n^2 yes?

does that help?

4. (Original post by gina94)
Hello, can anyone help me ? I have been doing table patterns and the sequence is as follows 10,40,90,160,250
30 50 70 90
20 20 20

nth term =dn+(a-d)
= 10n+0
= 10n is this right?

and

a+(n-1)+half(n-1)(n-2)c
10+(n-1)30+half(n-1)(n-2)20
10+30n-30+10(n-1)(n-2)20 this is as far as i can get

thank you,

Gina Ps I can help with a level english,psychology and physiology
It is a geometric series, not an arithmetic.
5. (Original post by gina94)
well i just spotted that your sequency was basically:
1,4,9,16 which is n^2.

10n^2 gives the one you have.

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