Hey, i have this question i can't figure out.
Use the identity (a-b)(a+b)=a^2-b^2 and the arithmetic of limits to evaluate
lim root(4+5x) - 5/
x approaches 1 x-1
So plug in 1, it's undefined. I tried a few things, rationalizing the denominator, timesing by the conjugate, to try and get rid of the 0 on the bottom but didnt really get anywhere.
I'm not really sure what to do next.
Thanks in advanced for whoever helps.
But it says to evaluate using that identity, and we've been taught a few ways to deal with undefined limits to see the possibilities but they haven't really worked for this one.
It's a pain in the butt, my tutor was kind of stumped on this one