document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1020410>Question 1020410</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.A very small library has only 4 books that you can borrow.the library allows you to borrow 1,2,3 or 4 books at a time.assuming tha you borrow at least one book ,how many different selections can you make?<BR>\n" );
document.write( "2. Lisa makek up a series of numbers.he finds each number in the series by multiplying the previous number by 3 & adding 5.if his fifth number is 767, what must his first number have been?<BR>\n" );
document.write( "Please help me </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #636293 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52780)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=636293\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "1.A very small library has only 4 books that you can borrow.the library allows you to borrow 1,2,3 or 4 books at a time. <BR>\n" );
document.write( "Assuming that you borrow at least one book ,how many different selections can you make?<BR>\n" );
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document.write( "It is the same as to ask: how many non-empty subsets are there in the set of 4 elements.\r<BR>\n" );
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document.write( "The answer is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E4-1 ALIGN=MIDDLE  ALT=\"2%5E4-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 15.\r<BR>\n" );
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document.write( "For details, &nbsp;see the lesson &nbsp;<A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/word/misc/How-many-subsets-are-there-in-a-given-finite-set-of-n-elements.lesson>How many subsets are there in a given finite set of n elements?</A>&nbsp; in this site.\r<BR>\n" );
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