document.write( "Question 772921: What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90?
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document.write( " -813
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document.write( " -790
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document.write( " -765
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document.write( " -714
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Algebra.Com's Answer #471188 by stanbon(75887) ![]() You can put this solution on YOUR website! What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90? \n" ); document.write( "---- \n" ); document.write( "S(17) = (17/2)(6 + (-90)) \n" ); document.write( "---- \n" ); document.write( "S(17) = (17/2)(-84) \n" ); document.write( "---- \n" ); document.write( "S(17) = 17*(-42) = -714 \n" ); document.write( "============================ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "================\r \n" ); document.write( "\n" ); document.write( "-813 \n" ); document.write( "-790 \n" ); document.write( "-765 \n" ); document.write( "-714 \n" ); document.write( " \n" ); document.write( " |