Maths
posted by Lucas .
In a quadratic sequence.....Term 2 is 11,Term 4 is 7,term 7 is 64....determin the general term for the sequence

4a + 2b + c = 11
16a + 4b + c = 7
49a + 7b + c = 64
(a,b,c) = (2,3,13)
So, Tn = 2n^2 + 3n + 13 
How dd u fynd dem....lyk de steps

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.