document.write( "Question 312331: please help me write the series in summation notation.\r
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document.write( "3+12+21+30+39+48+57\r
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document.write( "and\r
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document.write( "125+50+20+8+.... \n" );
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Algebra.Com's Answer #223282 by solver91311(24713)![]() ![]() You can put this solution on YOUR website! \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "John \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |