Find the limit as … - QuestionCove
OpenStudy (anonymous):

Find the limit as x approaches 2 for (4-x/2), then find delta > 0 such that |f(x)-L| < 0.01 whenever 0 < |x - c | < delta I could use 1) step by step explanation 2) a resource other than khan academy for delta epsilon examples

6 years ago
OpenStudy (amistre64):

since there is not bad values for x, it can be anything it wants to be and have a good value, then the limit is the same as the value of the equation when x = 2; which is either 3 or 1 in this case depending on how you meant to write it. $\frac{4-(2)}{2}=1$ $4-\frac{(2)}{2}=3$ To determine delta, solve for f(x) = 2+.01 , and f(x) = 2-.01 and pick the "x" value that is smaller

6 years ago
OpenStudy (anonymous):

one way is the one given by lifesaver which uses the knowledge that 4-x/2 is a continuous function of x. if you really want to verify the limit by epsilon delta definition choose an $\epsilon$. now create the inequation $\left| 4-x/2-3 \right|<\epsilon$ solving it you will get $x >2(1-\epsilon)$ and $x<2(1+\epsilon)$ hence our $\delta=\min(2(1+\epsilon),2(1-\epsilon))=2(1-\epsilon)$ as for this delta the definition of limit is satisfied . hence for any $\epsilon$ we are able to find a $\delta$ satisfying the definition of limit. hence the limit exists and is 3.

6 years ago