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" If "^(n)C(r-1)=36,^(n)C(r)=84" and "^(...

" If "^(n)C_(r-1)=36,^(n)C_(r)=84" and "^(n)C_(r+1)=126," find "n

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If .^(n)C_(r-1)=36,.^(n)C_(r)=84 and .^(n)C_(r+1)=126 , find find r.

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