<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span><font class="Apple-style-span" size="3">Boa noite! Estou com um problema, pretendo </font>determinar<font class="Apple-style-span" size="3"> o valor de <b>a</b> </font></span></div><div><span><font class="Apple-style-span" size="3">de modo que a matriz A dada abaixo seja singular. Como tenho que proceder no R????</font></span></div><div> [,1] [,2]<br></div><div><span><font class="Apple-style-span" size="3"><div>[1,] 1 8 </div><div>[2,] 3 a </div></font></span></div><div><span><font class="Apple-style-span" size="3"><br></font></span></div><div><font class="Apple-style-span" face="Calibri, sans-serif"><span class="Apple-style-span" style="font-size: 15px; line-height: 17px; "><br></span></font></div><div style="font-family: 'times
new roman', 'new york', times, serif; font-size: 12pt; "> </div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "><div><i><font color="#0000bf"><font face="comic sans ms">Edmundo do R. R. Caetano </font></font></i></div><div> </div></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "><br></div><div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "><div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "><font size="2" face="Arial"></font><br></div></div></div></body></html>