Posted by **Lucas** on Tuesday, February 26, 2013 at 10:38am.

In a quadratic sequence.....Term 2 is 11,Term 4 is -7,term 7 is -64....determin the general term for the sequence

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**Steve**, Tuesday, February 26, 2013 at 10:47am
4a + 2b + c = 11

16a + 4b + c = -7

49a + 7b + c = -64

(a,b,c) = (-2,3,13)

So, Tn = -2n^2 + 3n + 13

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**Lucas**, Tuesday, February 26, 2013 at 11:32am
How dd u fynd dem....lyk de steps

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**Steve**, Tuesday, February 26, 2013 at 11:54am
just solved the system of equations. I used wolframalpha.com, but you can use elimination, determinants, substitution, or whatever you like to use for solving systems of equations.

Algebra I stuff. Dust off those skills.

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