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# Arithmetic Series Watch

1. Ann started with 1750 sticks. Given that Ann continues the pattern to complete k rows but does not have sufficient sticks to complete the (k+1)th row,

c) show that k satisfies (3k-100)(k+35)<0

a = 4 d = 3

Been trying for 30mins, but keep getting different answers. help anyone

Jan 2007 paper question 9c
Ann started with 1750 sticks. Given that Ann continues the pattern to complete k rows but does not have sufficient sticks to complete the (k+1)th row,

c) show that k satisfies (3k-100)(k+35)<0

a = 4 d = 3

Been trying for 30mins, but keep getting different answers. help anyone

Jan 2007 paper question 9c
Some advice: use the formula for the sum of an arithmetic series. Substitute k for n since it is k rows. Put it less than 1750.
You should get
3. Thanks.

I was being stupid and using 1750 as the sum.
Thanks.

I was being stupid and using 1750 as the sum.
You're welcome

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