Better Students Ask More Questions.
f =ln (1+2/x) is concave if x<-2?explain
1 Answer | add yours
High School Teacher
Given `f=ln(1+2/x)` :
The domain of the function is `(-oo,-2)uu(0,oo)` . We are interested in the interval `(-oo,-2)` .
Note that the denominator is always positive. On the interval `(-oo,-2)` the numerator is always negative.
Thus the function is concave down for x<-2.
Posted by embizze on June 27, 2013 at 5:49 PM (Answer #1)
Join to answer this question
Join a community of thousands of dedicated teachers and students.