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Prove that every odd integer is the difference of two perfect squares
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What is the common difference in the following arithmetic sequence 7,3,-1,-5
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The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?
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Prove that every odd integer is the difference of two perfect squares...
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