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Hurkyl
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#8
Feb25-08, 09:54 PM
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Quote Quote by Shackman View Post
(1+2+...+n+(n+1))^2 != (1+2+...+n)^2 + (n+1)^2
As you say, that is not the correct formula for the square of two things. Fortunately, you know the right formula for the square of two things.... (right?)