<p>This question has some subscripts, so if you see a(1) that is really a with a subscript of 1. a(n) is the nth term of the sequence.</p>
<p>Question: If a(1) = 5 and a(n) = 1 + sqrt(a(n)-1) find a(3)</p>
<p>A. 2.623
B. 2.635
C. 2.673
D. 2.799
E. 3.323</p>
<p>The Barrons 8th Edition of Math II says this is B, but I'm confused because when I follow their directions I get D instead.</p>
<p>a2=1+sqrt(5)
a3=1+sqrt(1+sqrt(5))=2.799</p>
<p>Unless you typed it incorrectly, or I read the problem wrong, it must be a printing mistake.</p>
<p>Yeah, that’s exactly what I did. That must be a typo. This is the fourth error I’ve founded in Barrons. :(</p>
<p>Their solution:</p>
<p>Press 5 ENTER in your graphing calculator. Then enter sqrt(ans) + 1 and press enter twice to get the answer.</p>
<p>Barrons is notorious for their errors</p>