<p>can some one please explain to me u substitution or give me a link to a good site with the u-substitution method</p>
<p>i need help fast!!!!!!!!!!!!</p>
<p>could i get a 4 or 5 without the u substitution or do i need to learn it??????????</p>
<p>It's kind of important.
<a href="http://archives.math.utk.edu/visual.calculus/4/substitutions.1/index.html%5B/url%5D">http://archives.math.utk.edu/visual.calculus/4/substitutions.1/index.html</a></p>
<p>that seems a little complex from the start any thing easier</p>
<p>just pick a value from the integral to set as u. Then take the derivative of that value and ensure that it is there. If there is coefficient needed to make a value du, put the inverse of that value outside the integral.</p>
<p>i dont see how u can take calculus without knowing u sub</p>
<p>well many people just look at the integral and visualize where the constant factors would go if you differentiate, and then reverse that mentally...</p>
<p>at least, that is what I do...</p>
<p>that works until you get really nasty integrals.</p>
<p>if you don't know u sub, you probably can't solve 90% of the integrals.</p>
<p>^ False. I don't use u sub and I got a 5 on the 1998 AB test. I do it in my head. I still don't get the changing bounds thing though.</p>