document.write( "Question 1194598: Let r in N such that\r
\n" ); document.write( "\n" ); document.write( "1 binom 9 r - 1 binom 10 r = 11 6 binom 11 r .\r
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Algebra.Com's Answer #826836 by ikleyn(52781)\"\" \"About 
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