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10 questions from this quiz
A non-negative integer
n!k!(n−k)!\frac{n!}{k!(n-k)!}k!(n−k)!n!
n+1n + 1n+1
Sum of the two directly above it
x2+2xy+y2x^2 + 2xy + y^2x2+2xy+y2
3
They alternate
Always nnn
6
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