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Övn 2.3

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Versionen från 16 juli 2007 kl. 07.57 (redigera)
KTH.SE:u1zpa8nw (Diskussion | bidrag)

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Nuvarande version (16 juli 2007 kl. 07.59) (redigera) (ogör)
KTH.SE:u1zpa8nw (Diskussion | bidrag)
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Rad 1: Rad 1:
-__NOTOC__ 
-==Övning 2.3:1== 
-<div class="ovning"> 
-Kvadratkomplettera f&ouml;ljande uttryck 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="25%">x^2-2x</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="25%">x^2+2x-1</td> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="25%">5+2x-x^2</td> 
-<td class="ntext">d)</td> 
-<td class="ntext" width="25%">x^2+5x+3</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:2== 
-<div class="ovning"> 
-L&ouml;s f&ouml;ljande andragradsekvationer med kvadratkomplettering 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="33%">x^2-4x+3=0</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="33%">y^2+2y-15=0</td> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="33%">y^2+3y+4=0</td> 
-</tr> 
-<tr align="left"> 
-<td class="ntext">d)</td> 
-<td class="ntext" width="33%">4x^2-28x+13=0</td> 
-<td class="ntext">e)</td> 
-<td class="ntext" width="33%">5x^2+2x-3=0</td> 
-<td class="ntext">f)</td> 
-<td class="ntext" width="33%">3x^2-10x+8=0</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:3== 
-<div class="ovning"> 
-L&ouml;s f&ouml;ljande ekvationer direkt 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="50%">x(x+3)=0</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="50%">(x-3)(x+5)=0</td> 
-</tr> 
-<tr align="left"> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="50%">5(3x-2)(x+8)=0</td> 
-<td class="ntext">d)</td> 
-<td class="ntext" width="50%">x(x+3)-x(2x-9)=0</td> 
-</tr> 
-<tr align="left"> 
-<td class="ntext">e)</td> 
-<td class="ntext" width="50%">(x+3)(x-1)-(x+3)(2x-9)=0</td> 
-<td class="ntext">f)</td> 
-<td class="ntext" width="50%">x(x^2-2x)+x(2-x)=0</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:4== 
-<div class="ovning"> 
-Best&auml;m en andragradsekvation som har r&ouml;tterna 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="100%">-1\ och \ 2</td> 
-</tr> 
-<tr align="left"> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="100%">1+\sqrt{3}\ och \ 1-\sqrt{3}</td> 
-</tr> 
-<tr align="left"> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="100%">3\ och \ \sqrt{3}</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:5== 
-<div class="ovning"> 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="100%">Best&auml;m en andragradsekvation som bara har \,-7\, som rot.</td> 
-</tr> 
-<tr>  
-<td class="ntext">b)</td> 
-<td class="ntext" width="100%">Best&auml;m ett v&auml;rde p&aring; \,x\, som g&ouml;r att uttrycket \,4x^2-28x+48\, &auml;r negativt.</td> 
-</tr> 
-<tr> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="100%">Ekvationen \,x^2+4x+b=0\, har en rot \,x=1\,. Best&auml;m v&auml;rdet p&aring; konstanten \,b\,.</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:6== 
-<div class="ovning"> 
-Best&auml;m det minsta v&auml;rde som f&ouml;ljande polynom antar 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="33%">x^2-2x+1</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="33%">x^2-4x+2</td> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="33%">x^2-5x+7</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:7== 
-<div class="ovning"> 
-Best&auml;m det st&ouml;rsta v&auml;rde som f&ouml;ljande polynom antar 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="33%">1-x^2</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="33%">-x^2+3x-4</td> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="33%">x^2+x+1</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:8== 
-<div class="ovning"> 
-Skissera grafen till f&ouml;ljande funktioner 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="33%">f(x)=x^2+1</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="33%">f(x)=(x-1)^2+2</td> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="33%">f(x)=x^2-6x+11</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:9== 
-<div class="ovning"> 
-Hitta alla sk&auml;rningspunkter mellan x-axeln och kurvan 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="33%">y=x^2-1</td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="33%">y=x^2-5x+6</td> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="33%">y=3x^2-12x+9</td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 
- 
-==&Ouml;vning 2.3:10== 
-<div class="ovning"> 
-Rita in i ett ''xy''-plan alla punkter vars koordinater \,(x,y)\, uppfyller 
-<table width="100%" cellspacing="10px"> 
-<tr align="left"> 
-<td class="ntext">a)</td> 
-<td class="ntext" width="50%">y \geq x^2\ och \ y \leq 1 </td> 
-<td class="ntext">b)</td> 
-<td class="ntext" width="50%">y \leq 1-x^2\ och \ x \geq 2y-3 </td> 
-</tr> 
-<tr align="left"> 
-<td class="ntext">c)</td> 
-<td class="ntext" width="50%">1 \geq x \geq y^2 </td> 
-<td class="ntext">d)</td> 
-<td class="ntext" width="50%">x^2 \leq y \leq x </td> 
-</tr> 
-<tr><td height="5px"/></tr> 
-</table> 
-</div> 

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