<p>can anyone please solve this problem, I am having alot of trouble with it and i have a test tomorrow. Thanks</p>
<p>(radical x - radical 7) / (x-7)</p>
<p>What exactly do you need to do?</p>
<p>Most likely, you will use the fact: (x-7)=[sqrt(x)-sqrt(7)]*[sqrt(x)+sqrt(7)]</p>
<p>we have to find the limit. Yeh I got that part. But from there I am lost.</p>
<p>The limit as x approaches what?</p>
<p>limit as x goes to what?</p>
<p>the limit is as x goes to 7</p>
<p>Just plug it in. lim{1/[sqrt(x)+sqrt(7)],x->7}=1/[2*sqrt(7)]</p>
<p>Or you could use L'Hopitals rule from the start.</p>
<p>i would think it's .1889.</p>
<p>1/(2sqrt7)</p>
<p>Edit: oops...didn't see averagemathgeek's post.</p>
<p>lol it took potomac a while to actually ask the question.</p>