<p>helping a friend in honors calc, kinda stumped on an easy problem...</p>
<p>f(x) = radical x</p>
<p>find the point closest to (3,0). use distance formula.</p>
<p>how shud i go about this ??</p>
<p>It's where the graph of y=sqrt((3-x)^2+(0-f(x))^2) has a minimum value</p>
<p>wouldn't it just be x rather than the sqrt(x)? </p>
<p>and okay, given that equation, then take its derivative and set it equal to zero?</p>
<p>I caught myself on that sqrt(x) thing, but yeah, you're right.</p>
<p>yeah, you take the derivative, set it equal to zero, then make sure it's a min and not a max...</p>
<p>right thanks...don't wanna be annoying but i got (5/2, sqrt (5/2) ) as my answer....double check? =)</p>