...I have to evaluate the following limits:
a) lim x -> 7
(square root(x+2)) -3 / (x-7
I was unable to solve this
rationalize the numerator ... multiply by
b) lim x -> 0
1/x - 1/(x^2 + x)
Somehow simplified it to 0 / x+1... this makes no sense.
c) lim x -> -infinity
(square root(4x^2 + 1)) / (3x-5)
first, note that the limit will be less than 0. divide the numerator and denominator by x ...