document.write( "Question 1083331: Find the sum of n terms of series 1+3x+5x^2+7x^3+......... \n" ); document.write( "
Algebra.Com's Answer #697347 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Let S = the sum of the first n terms of the given sequence.\r\n" );
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document.write( "The nth term will have coefficient (2n-1) and (n-1)st power of x.\r\n" );
document.write( "So we have:\r\n" );
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document.write( "Multiply the sequence through by -x and add term by term to\r\n" );
document.write( "the given sequence:\r\n" );
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document.write( "Can you finish from here?:\r\n" );
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document.write( "The n-1 terms between the first and last ones form a geometric \r\n" );
document.write( "series.  Use a formula for them, then you can solve for S.\r\n" );
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document.write( "If you have trouble, tell me in the thank-you note form below \r\n" );
document.write( "and I'll get back to you by email.  No charge as I do this\r\n" );
document.write( "for fun.\r\n" );
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document.write( "Edwin
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