2.1

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=3 height=24 BGCOLOR="#006666" TEXT="#080000"> <div> <FONT SIZE="4" COLOR="#FFFFFF" FACE="Georgia" ><B>M</B></FONT><FONT SIZE="4" COLOR="#FFFFFF" FACE="Georgia" ><B>atemáticas de la U</B></FONT><B> (MatU)  | </B><A HREF="http://www.jcbmat.com/" TARGET="_top" TITLE="http://www.jcbmat.com/"><U><B>Home</B></U></A><B> | </B><A HREF="index.htm" TARGET="_top" TITLE="Cálculo 21"><U><B>Cálculo de una variable</B></U></A><B> | </B><A HREF="id488.htm" TARGET="_top" TITLE="Leithold EC7"><U><B>Leithold</B></U></A> |</div> </td> </tr><tr> <td valign="top" rowspan="2" width=165 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <B> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:inline-block;width:160px;height:600px" data-ad-client="ca-pub-1578463498418701" data-ad-slot="3073775660"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script>  </B></div> </td> <td valign="top" height=432 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> Ejercicios 2.1</div> <div> <B>Definición de límite de una función y teoremas de límites</B></div> <bR> <div>  <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-1578463498418701" data-ad-slot="3926688482" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script>  </div> <bR> <div> <FONT SIZE="5" COLOR="#0099CC" FACE="Times New Roman" ><B>E</B></FONT>jercicio <FONT SIZE="3" COLOR="#FF0000" FACE="Times New Roman" ><B>1</B></FONT></div> <div>  <iframe width="560" height="315" src="https://www.youtube.com/embed/BermDC2vj7k" frameborder="0" allowfullscreen></iframe>  </div> <bR> <div>  <A NAME="2"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>2</div> <div> <IMG SRC="25cde7550.gif" border=0 width="743" height="597" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="3"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>3</div> <div> <IMG SRC="25d320870.gif" border=0 width="800" height="1159" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="6"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>6</div> <div> <IMG SRC="25d420580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25d520580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="9"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>9</div> <div> <IMG SRC="25d620580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25d720230.gif" border=0 width="800" height="547" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="12"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>12</div> <div> <IMG SRC="25d8201a0.gif" border=0 width="800" height="538" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25d920ef0.gif" border=0 width="800" height="495" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="15"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>15</div> <div> <IMG SRC="25da20580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25db20580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25dc208c0.gif" border=0 width="800" height="396" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="18"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>18</div> <div> <IMG SRC="25dd20580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25de20580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="21"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>21</div> <div> <IMG SRC="25df20340.gif" border=0 width="800" height="564" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25e020eb0.gif" border=0 width="800" height="235" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="24"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>24</div> <div> <IMG SRC="25e120580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25e220580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="27"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>27</div> <div> <IMG SRC="25e320910.gif" border=0 width="800" height="401" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="30"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>30</div> <div> <IMG SRC="25e420580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div>  <A NAME="33"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>33</div> <div> <IMG SRC="25e520370.gif" border=0 width="800" height="567" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="36"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A><FONT SIZE="3" COLOR="#FFFFFF" FACE="Times New Roman" >36</FONT></div> <div> <IMG SRC="25e620580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25e720830.gif" border=0 width="800" height="131" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="39"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>39</div> <div> <IMG SRC="25e820580.gif" border=0 width="800" height="600" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25e9203c0.gif" border=0 width="800" height="572" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25ea20370.gif" border=0 width="800" height="567" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="25eb20ed0.gif" border=0 width="800" height="237" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div>  <A NAME="45"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>45</div> <div> <IMG SRC="25ec208c0.gif" border=0 width="800" height="908" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <bR> <DIV ALIGN="LEFT"></DIV> <div> <B> <img src="HTMLobj-11764/aniGif.gif" border="0" align="bottom" width="550" height="14">  </B></div> <bR> <div> <IMG SRC="2c128c8c0.gif" 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