- #1
ParisSpart
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In the expansion of ((x1 + x2 +... + x33) ^ 4) how many monomials are of the form (xi ^ 2)*(xj^2)
with i not equal with j
if we add the coefficients of all these mononymon what is the sum?
E.g. the expansion of (x1 + x2 + x3) ^ 4 the requested number is 18
this is a probability quiz but i can think how to solve it with theory of probabilities any ideas for howmto beggin to solve this?
with i not equal with j
if we add the coefficients of all these mononymon what is the sum?
E.g. the expansion of (x1 + x2 + x3) ^ 4 the requested number is 18
this is a probability quiz but i can think how to solve it with theory of probabilities any ideas for howmto beggin to solve this?