What is the slope of the line normal to the tangent line of #f(x) = 1/x+x^3 # at # x= 2 #?
1 Answer
Sep 17, 2016
Explanation:
The slope of the line tangent to the curve
First, find
#f'(x) = frac{d}{dx}(1/x + x^3)#
#= -1/x^2 +3x^2#
Find
#f'(2) = -1/2^2 + 3(2)^2#
#= 47/4#
The slope of the line normal to the tangent line,
#m = -1/(f'(2))#
#= - 4/47#