document.write( "Question 849495: Sum -(in summation notation)
\n" ); document.write( " lower limit is i = 3 and upper limit is n of:
\n" ); document.write( "(-3-4i) = -507\r
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Algebra.Com's Answer #511607 by AnlytcPhil(1806) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "I changed my solution:\r\n" );
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document.write( "That's the sequence\r\n" );
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document.write( "-3-4(3) = -3-12 = -15\r\n" );
document.write( "-3-4(4) = -3-16 = -19\r\n" );
document.write( "-3-4(5) = -3-20 = -23\r\n" );
document.write( "-3-4(6) = -3-24 = -27\r\n" );
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document.write( "-3-4(n) = -3-4n\r\n" );
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document.write( "So that is the sum of the arithmetic sequence with\r\n" );
document.write( "first term -15, last term -3-4n and n-2 terms [there are\r\n" );
document.write( "2 less since are no terms for i=1 or i=2]\r\n" );
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document.write( "Sum = \r\n" );
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document.write( "Edwin

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