document.write( "Question 1201458: write the following using sigma notation and find the sum 11,4,-3,-10,....,-143 \n" ); document.write( "

Algebra.Com's Answer #835864 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "we need to find what n equals when 18-7n = -143\r\n" );
document.write( "                                     -7n = -161\r\n" );
document.write( "                                       n = 23\r\n" );
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document.write( "  <-- summation notation for sum\r\n" );
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document.write( "We use the formula for \r\n" );
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document.write( "  <--sum\r\n" );
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document.write( "Edwin

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