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12 cards from this deck
nth term contains n2n^2n2 as highest power
Tn=an2+bn+cT_n = an^2 + bn + cTn=an2+bn+c
Second differences are constant
Half the second difference
2
3
Create a differences table
Check if second differences are constant
Use simultaneous equations
Substitute back to verify it works for original terms
If a=0a = 0a=0, sequence not quadratic
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