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OpenStudy (anonymous):
find coefficient of x^n in (1+2x+3x^2+...)^(0.5) n being any positive integer.
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OpenStudy (anonymous):
1+2x+3x^2+.... is (1-x)^(-2) so x^n in (1-x)^-1 which is solvable
OpenStudy (watchmath):
then 1?
OpenStudy (anonymous):
yes
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