SOLUTION: can any one help! determine the rate of change of the function : y = 4x^2 + x^2/2 + 6 when x = 1 thanks

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: can any one help! determine the rate of change of the function : y = 4x^2 + x^2/2 + 6 when x = 1 thanks      Log On


   

Question 910717: can any one help!
determine the rate of change of the function :
y = 4x^2 + x^2/2 + 6 when x = 1
thanks
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I assume you mean the derivative.
y=4x%5E2%2B%281%2F2%29x%5E2%2B6
y=%289%2F2%29x%5E2%2B6
So then,
dy%2Fdx=2%289%2F2%29x
dy%2Fdx=9x
So at x=1
dy%2Fdx=9