How do you find the local max and min for #f(x) = 7x + 9x^(-1)#?
1 Answer
Nov 29, 2016
To find the local extrema we find the points where the first derivative is null and study the sign of the second derivative
Explanation:
Find the values of
In both points
1) around
2) around
graph{7x+9/x [-47.3, 47.2, -73.6, 73.6]}