
Re: Help with limit problem?
Posted:
Sep 11, 2007 11:52 AM


In article <s7ede3d44iftv6e0r72q0s6km4ihoc3d48@4ax.com>, <me@privacy.net> wrote: >Taking Calc 1 > >One problem I'm working on is to find Limit as x >approaches zero for x raised to 4 power minus one over >x raised to three power minus one > >I'm stuck trying to factor it1 > >Advice?
Synthetic or long division. If a polynomial p(x) evaluates to 0 when you plug in a number a, then xa divides p(x).
In this case, both x^4  1 and x^3  1 evaluate to 0 when you plug in 1, so you can factor x1 from both. Do long division to see what you get, cancel the factor of x1 from the quotient, lather, rinse, and repeat.
 ====================================================================== "It's not denial. I'm just very selective about what I accept as reality."  Calvin ("Calvin and Hobbes" by Bill Watterson) ======================================================================
Arturo Magidin magidinatmemberamsorg

