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If (""^(n)C(r-1))/(a)=(""^(n)C(r))/(b)=(...

If `(""^(n)C_(r-1))/(a)=(""^(n)C_(r))/(b)=(""^(n)C_(r))/(c)` prove that `n=(ab+2ac+bc)/(b^(2)-ac) and r=(a(b+c))/(b^(2)-ac)`.

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If (.^(n)C_(r-1))/(a)=(.^(n)C_(r))/(b)=(.^(n)C_(r+1))/(c) n=(ab+2ac+bc)/(b^(2)-ac)andr=(a(b+c))/(b^(2)-ac) .

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