document.write( "Question 1131527: The first term of an arithmetic sequence is -3 and the fifteenth term is 53. What is the common difference of the sequence?\r
\n" ); document.write( "\n" ); document.write( "14/13
\n" ); document.write( "25/7
\n" ); document.write( "4
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Algebra.Com's Answer #748196 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "The nth term of an arithmetic sequence is:\r
\n" ); document.write( "\n" ); document.write( "\"a%5Bn%5D=a%5B1%5D%2B%28n-1%29d\"\r
\n" ); document.write( "\n" ); document.write( "if the first term of an arithmetic sequence is \"-3\" and the fifteenth term is \"53\", we have\r
\n" ); document.write( "\n" ); document.write( "\"a%5B1%5D=-3\"
\n" ); document.write( "\"a%5B15%5D=53\"
\n" ); document.write( "\"n=15\"\r
\n" ); document.write( "\n" ); document.write( "so, \r
\n" ); document.write( "\n" ); document.write( "\"53=-3%2B%2815-1%29d\"\r
\n" ); document.write( "\n" ); document.write( "\"53%2B3=14d\"
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\n" ); document.write( "\"56=14d\"\r
\n" ); document.write( "\n" ); document.write( "\"d=56%2F14\"\r
\n" ); document.write( "\n" ); document.write( "\"d=4\"=> the common difference of the sequence\r
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