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lim x --> 0
(1/2+x) - (1/2)
_____________
x
. . . I know the answer's -1/4, I just don't know how to get there.
I'm not really even sure why it's confusing me. I just got done with a chapter about limits... Maybe the x's in both numerator and denominator are killing me..?
I know I can't substitute. Gwah!
do you mean $\displaystyle \lim_{x \to 0} \frac {\frac 1{2 + x} - \frac 12}x$? if so, use parenthese!Quote:
Originally Posted by spinscent
there are not many options here. combine the fractions in the numerator.
$\displaystyle \Rightarrow \lim_{x \to 0} \frac {\frac {2 - 2 - x}{2(2 + x)}}x = \lim_{x \to 0} \frac {-x}{2(2 + x)} \cdot \frac 1x$
now what?
