Binomial theorem SE13: Coefficient of x^2 in (1+x)^2+(1+x)^3+..+(1+x)^49+(1+mx)^50 is (3n+1)51C3.

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Binomial theorem SE13: Math marvels: Coefficient of x^2 in (1+x)^2+(1+x)^3+..+(1+x)^49+(1+mx)^50 is (3n+1)51C3. Support the channel:
  1. Mathsmerizing
  2. (1 x)^2 -(1 x)^3 .. (1 x)^49 (1 mx)^50
  3. (3n 1)51C3
  4. independent
  5. integral
  6. Binomial
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