document.write( "Question 634229: What is the formula for the following arithmetic sequence? -2, 3, 8, 13, .. \n" ); document.write( "
Algebra.Com's Answer #399436 by jim_thompson5910(35256)\"\" \"About 
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You're adding 5 each time. So d = 5\r
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\n" ); document.write( "\n" ); document.write( "You're starting at -2, so a1 = -2\r
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\n" ); document.write( "\n" ); document.write( "The formula is then\r
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\n" ); document.write( "\n" ); document.write( "an = a1 + (n-1)*d\r
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\n" ); document.write( "\n" ); document.write( "an = -2 + (n-1)*5\r
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\n" ); document.write( "\n" ); document.write( "an = -2 + 5n-5\r
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\n" ); document.write( "\n" ); document.write( "an = 5n - 7\r
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\n" ); document.write( "\n" ); document.write( "So the formula is \"a%5Bn%5D=5n-7\" where n starts at \"n=1\"\r
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