document.write( "Question 142676This question is from textbook McDougal Littell Algebra 2 \n" );
document.write( ": The question is asking for the rule for the nth term for this sequence: (-5, 10, -15, 20, ...) \r \n" );
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document.write( "I can't figure out how to get alternating postive and negative numbers. \r \n" );
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document.write( "-25: an = -5n^(???) is among the many ideas I have tried.\r \n" );
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document.write( "(an means \"a sub n\") \n" );
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