Mathematics
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Ben Martin's user avatar
Ben Martin's user avatar
Ben Martin
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7
Minimum value of $(x^2+y^2)^2$
6
Prove combinatorially that: $\displaystyle {{n}\choose{k}} {{n}\choose{m}} = \sum^{k}_{i=0} {{n}\choose{m+i}}{{m+i}\choose{k}} {{k}\choose{i}}$
5
Why does short run market supply become more elastic with more firms