<p>Hey can someone clarify this for me? I think I'm getting it wrong... from what I understand, given a case where a function is divided by the function, you differentiate the function and then sub the number x approaches into the answer you get from differentiation? Then how come it doesn't work most of the times I try to do it.. what conditions are there to applying it?</p>
<p>u sure ur in SAT :P? can u give us an example Q at least?</p>
<p>If I remember correctly, you’d use L’Hopital’s rule for indeterminate forms. i.e. infinity/infinity.</p>
<p>oops sorry wrong forum should be in SAT subject.</p>
<p>lim(x->a) f(x)/g(x) = lim(x->a) f’(x)/g’(x) = lim(x->a) f’‘(x)/g’'(x) = …
It’s really that simple, and I don’t think there are conditions to using it, though usually you use it when you have the indeterminate forms 0/0 or infinity/infinity.</p>