document.write( "Question 697086: guess a simple formula for the sequence hat begin: -1, 1/2, -1/3, 1/4, -1/5 \n" ); document.write( "

Algebra.Com's Answer #429647 by josmiceli(19441) $\"\"$ $\"About$

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When you have an alternating sign like
\n" ); document.write( "-,+,-,+,-, . . . etc. you get this with the
\n" ); document.write( "factor $\"+%28-1%29%5En+\"$ ,where $\"+n+\"$ is the
\n" ); document.write( "number of the term.
\n" ); document.write( "The denominator is just the number of the term,
\n" ); document.write( "so you get $\"+%28-1%29%5En+%2F+n+\"$
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