Question #ce2e0
1 Answer
Nov 12, 2016
Although we could solve for
Explanation:
I assume that you want the second derivative of
Find
Differentiate again:
Simplify a bit,
# = (-y+xdy/dx)/y^2#
Replace
# = (-y+x(-x/y))/y^2#
Simplify again
# = (-y-x^2/y)/y^2#
Clear the fraction in the nmumerator
# = ((-y-x^2/y)*y)/(y^2*y)#
# = (-y^2-x^2)/y^3#
Factor out a #-1)
# = (-(y^2+x^2))/y^3#
Use the original rfelationship
# = (-90)/y^3#