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# help

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Solve \(\dfrac{1^2 + 2^2 + \dots + n^2}{1 + 2 + \dots + n} = 13\)

May 9, 2020

#1
+31316
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As follows:

Of course, it helps to know the summations!  They occur often enough that they are worth memorising.

May 9, 2020