document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=548588>Question 548588</A>: <I><SPAN STYLE=\"word-break: break-all;\"> write the equivalence for series 1,3,5,7,11,13... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #357169 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=357169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Did you skip a 9 in there? As written it is not a sequence/series that you would expect. It's like finding that the correct answer to \"miss America\" in a Jeopardy game is \"If the USSR sent an intercontinental ballistic missile aimed at the US, what would you hope it would do?\"<BR>\n" );
document.write( "I would expect 1, 3, 5, 7, 9, 11, 13, ..., which I would call an arithmetic sequence (not a series), and it includes that 9, between the 7 and the 11. That would make it an arithmetic sequence with a common difference of 2 (where each number is the previous one plus 2).<BR>\n" );
document.write( "I would describe it with the recursive formula <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5Bn%5D=a%5Bn-1%5D%2B2 ALIGN=MIDDLE  ALT=\"a%5Bn%5D=a%5Bn-1%5D%2B2\"   DISABLED_style= \"max-width:90%; height:auto;\" > with <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D=1 ALIGN=MIDDLE  ALT=\"a%5B1%5D=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I could also use an explicit formula, such as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5Bn%5D=1%2B2%28n-1%29 ALIGN=MIDDLE  ALT=\"a%5Bn%5D=1%2B2%28n-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5Bn%5D=2n-1 ALIGN=MIDDLE  ALT=\"a%5Bn%5D=2n-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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