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How do you use strong induction to show that the coefficient of x^2 in the expansion...

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Advance Math

How do you use strong induction to show that the coefficient ofx^2 in the expansion of (1+x+x^2+...x^n)^n is (1+2+...n)?

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We will use strong induction on n to show that the coefficientof in the expansion of is Base Step For n 2 So the    See Answer
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