document.write( "Question 386385: Can I please get some help?\r
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document.write( "Cosider the following arithmetic sequences:
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document.write( " 3, 7, 11, 15, 19.....\r
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document.write( " What is the 199th term a199, of this sequence.\r
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document.write( "Find the sum of the first 199 term of this sequence. \r
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document.write( "Thank you \n" );
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Algebra.Com's Answer #273164 by robertb(5830)![]() ![]() You can put this solution on YOUR website! Can I please get some help? \n" ); document.write( "Consider the following arithmetic sequences: \n" ); document.write( "3, 7, 11, 15, 19..... \n" ); document.write( "What is the 199th term a199, of this sequence. \n" ); document.write( "Find the sum of the first 199 term of this sequence. \n" ); document.write( "Thank you \n" ); document.write( "------------------------------------------------------------------------- \n" ); document.write( "an = a1 + (n-1)d; \n" ); document.write( "an = 3 + (n-1)4 = 3 + 4n - 4 = 4n-1. Hence a199 = 4*199-1 = 795. \n" ); document.write( "S199 = (199/2)(3+795) = (199/2)*798 = 79,401. \n" ); document.write( " |