function M(x){v=" "+1.0000000001*x+" ";
  if (v.length < 8) {Mv=eval(v);} else {Mv=eval(v.substring(0,8));}
  return Mv};
function trabalho1(mec,nom){
var DataActual = new Date();
ip = "18.117.158.141";
if ((mec.length==5) && (nom.length > 6)){ 
  with(Math){
	a0="<table width=100%><tr><td bgcolor=ddddcc>";
  a1="<font size =-1> [Apresente em FP(10,5) ou 5 dígitos c/<i>arred. simétrico</i>, e usar precisão dupla internamente]</font></td></tr><tr><td bgcolor=dddddd><font face=garamond size=+0 color=000000>";
  a1+="<ul><li><b>1ª Questão:</b><font face=arial size=-2 color=550000>[12.0 valores]</font>";
  xmec=eval(mec);
  opmec= xmec % 5;onzec= xmec % 9;
  cmec= 11 + opmec;
  a11=1;a12=0;a13=1; a21=0;a22=1;a23=cmec; a31=2;a32=cmec;a33=1+cmec*cmec;     
  switch (opmec) {
  case 0: 
    bex1="(4.1"+onzec+", 45.1, 500)";bap1="(4.1"+onzec+", 45 , 501)";
  	break;
  case 1: 
    bex1="(3.4"+onzec+", 41.4, 500)";bap1="(3.4"+onzec+", 41.3 , 501)";
  	break;
  case 2: 
    bex1="(2.3"+onzec+", 30.6, 400)";bap1="(2.3"+onzec+", 30.4, 401)";
  	break;
  case 3: 
    bex1="(2.5"+onzec+", 35.6, 500)";bap1="(2.5"+onzec+", 35.4, 501)";
  	break;
  case 4: 
    bex1="(1.7"+onzec+", 26.6, 400)";bap1="(1.7"+onzec+", 26.4, 401)";
  	break;
  default: fu1 = "ERRO do BROWSER";
  }
  matA1="<center><table border=0><tr><td><font color=#551122><b>A</b> = </td><td><table><tr><td align=center><font face=symbol>é</font></td><td align=center>"+a11+"<font face=symbol>&nbsp;</font></td><td align=center>"+a12+"<font face=symbol>&nbsp;</font></td><td align=center>"+a13+"</td><td align=center><font face=symbol>ù</font></td></tr><tr><td align=center><font face=symbol>ê</font></td><td align=center>"+a21+"<font face=symbol>&nbsp;</font></td><td align=center>"+a22+"<font face=symbol>&nbsp;</font></td><td align=center>"+a23+"</td><td align=center><font face=symbol>ú</font></td></tr><tr><td align=center><font face=symbol>ë</font></td><td align=center>"+a31+"<font face=symbol>&nbsp;</font></td><td align=center>"+a32+"<font face=symbol>&nbsp;</font></td><td align=center>"+a33+"</td><td align=center><font face=symbol>û</font> </td></tr></table></td><td></font></td></tr></table></center>";
	a1+=" Considere a matriz "+matA1+"<ul>";
	a1+="<li> Apresente os números de condição:<br> cond<sub><font size=-1><font face=symbol>&yen;</font></font></sub>(<b>A</b>)= <input TYPE=text SIZE=10>;  cond<sub><font size=-1>1</font></sub>(<b>A</b>)= <input TYPE=text SIZE=10>;  cond<sub><font size=-1><font face=symbol>r</font></font></sub>(<b>A</b>)= <input TYPE=text SIZE=10>.";
	a1+="<li> Seja <b>b=</b>"+bex1+", <b>b<sup><font size=-1>~</font></sup></b>="+bap1+". ";
	a1+="Resolva <b>A x = b</b> ; <b>A x<sup><font size=-1>~</font></sup> = b<sup><font size=-1>~</font></sup></b> : <br>";
	a1+="<b>x</b>= <input TYPE=text SIZE=20> ;  <b>x<sup><font size=-1>~</font></sup></b>= <input TYPE=text SIZE=20>;";
	a1+="<li> Determine a razão entre os erros relativos";
	a1+="<br> ||<b><font face=symbol>d</font><sub>x</sub></b>||<sub><font face=symbol>&yen;</font></sub>: <input TYPE=text SIZE=10> <font size=+1>/</font> ||<b><font face=symbol>d</font><sub>b</sub></b>||<sub><font face=symbol>&yen;</font></sub>: <input TYPE=text SIZE=10> = <input TYPE=text SIZE=10>";
	a1+="<li> Para a mesma matriz, considere a razão 	R(<b>b</b>) = ||<b><font face=symbol>d</font><sub>x</sub></b>||<sub><font face=symbol>&yen;</font></sub>/ ||<b><font face=symbol>d</font><sub>b</sub></b>||<sub><font face=symbol>&yen;</font></sub>, ";
	a1+="<ul><li> para o mesmo <b>b</b> encontre <b>b</b><sup><font size=-1>~</font></sup></b> = <input TYPE=text SIZE=12> tal que R(<b>b</b>) = <input TYPE=text SIZE=12> <font face=symbol>&#187;</font> 1";
	a1+="<li> encontre {<b>b, b<sup><font size=-1>~</font></sup></b>} = <input TYPE=text SIZE=20> : R(<b>b</b>) = <input TYPE=text SIZE=12> <font face=symbol>&#187;</font> cond<sub><font face=symbol>&yen;</font></sub>(<b>A</b>)";	
	a1+="</ul></ul>";
	
	a11=4;a12=-2;a13=7+(xmec % 4);
  a21=3+(xmec % 5);a22=0;a23=-(xmec % 5);
  a31=1;a32=3+(xmec % 3);a33=-1;
  matA2="<center><table border=0><tr><td><font color=#551122><b>A</b> = </td><td><table><tr><td align=center><font face=symbol>é</font></td><td align=center>"+a11+"<font face=symbol>&nbsp;</font></td><td align=center>"+a12+"<font face=symbol>&nbsp;</font></td><td align=center>"+a13+"</td><td align=center><font face=symbol>ù</font></td></tr><tr><td align=center><font face=symbol>ê</font></td><td align=center>"+a21+"<font face=symbol>&nbsp;</font></td><td align=center>"+a22+"<font face=symbol>&nbsp;</font></td><td align=center>"+a23+"</td><td align=center><font face=symbol>ú</font></td></tr><tr><td align=center><font face=symbol>ë</font></td><td align=center>"+a31+"<font face=symbol>&nbsp;</font></td><td align=center>"+a32+"<font face=symbol>&nbsp;</font></td><td align=center>"+a33+"</td><td align=center><font face=symbol>û</font> </td></tr></table></td><td>";
	a2="<li><b>2ª Questão:</b><font face=arial size=-2 color=550000>[8.0 valores]</font> ";
	a2+="Considere a matriz "+matA2+" ";
	a2+="e o sistema <b>Ax=b</b> com ||<b>b</b>||<sub><font face=symbol>&yen;</font></sub> = Q .</td></tr></table></center>";
	a2+="Começando com <b>x<sup>(0)</sup> = 0</b>, (e modificando apropriadamente)<ul>" ;
	a2+="<li> Método de Jacobi: apresente ||<b>e<sup>(k)</sup></b>||<sub><font face=symbol>&yen;</font></sub> <u>&lt;</u> <input TYPE=text SIZE=12> (<i>em função de</i> k e Q)<br> justifique: <input TYPE=text SIZE=60>";
	bb= (1 + xmec % 5)*(-1 + 2*(xmec % 2));
 	a2+="<li> Seja <b>b</b>=( "+bb+", "+bb+", "+bb+"). Pelo Método de Jacobi determine<br><b>x<sup>(6)</sup></b> = <input TYPE=text SIZE=12>";
 	a2+=" ; estimativa de erro ||<b>e<sup>(6)</sup></b>|| <u>&lt;</u> <input TYPE=text SIZE=12>";
 	a2+="<br> Use isso para determinar (inteiro) k <u>&gt;</u> <input TYPE=text SIZE=12>: ||<b>e<sup>(k)</sup></b>|| <u>&lt;</u> 10<sup>-32</sup>";
 	a2+="<li> Método de Gauss-Seidel (mesmo <b>b, x<sup>(0)</sup></b>) calcule <b>x<sup>(8)</sup></b> = <input TYPE=text SIZE=12>";  a3="</ul>";
  a4="";
	an="</ul><b>Este trabalho foi realizado individualmente pelo aluno:</b><br>";
	an+="<font face=arial size=-2>Validação: "+"C"+DataActual.toString().substring(6,24)+"."+ip+"."+DataActual.getTime().toString(16)+"|Nº aluno="+xmec+"</font>";
  an+="<p>Data: ____ / __ /__  ; Assinatura: __________________________________  (<b>"+nom+"</b>)</p>";
  an+="</font></td></tr></table>";
  document.getElementById('Trab').innerHTML=a0+a1+a2+a3+a4+an;
return}}
else{ 
  a0="<table width=90%><tr><td bgcolor=ffcccc><font face=garamond size=+0 color=000000><ul>";
  a1="<li> Inválido... <i>número mecanográfico/nome</i> ! </ul></font>";
  an="</font></td></tr></table>";
  document.getElementById('Trab').innerHTML=a0+a1+an;
return};
}