document.write( "Question 390915: 1/2+1/6+1/12+1/20+1/30...1/n(n+1) \n" ); document.write( "
Algebra.Com's Answer #277252 by robertb(5830)\"\" \"About 
You can put this solution on YOUR website!
\"1%2F2%2B1%2F6%2B1%2F12%2B1%2F20%2B1%2F30\"+...+\"1%2F%28%28n-1%29n%29+%2B+1%2F%28n%28n%2B1%29%29\"
\n" ); document.write( "=+...+\"%281%2F%28n-1%29+-+1%2Fn%29+%2B+%281%2Fn+-+1%2F%28n%2B1%29%29\"
\n" ); document.write( "=\"1+-++1%2F%28n%2B1%29\" because of \"telescoping\" property.
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