Math
posted by Roni .
solve first derivative of f(x)=460+100QQ2 where Q=10

If:
f(x)= 460+100QQ^2
Then:
f´(x)=df/dQ=100Q+2Q=2*(50+q)
For Q=10
f´(x)=2*(50+10)=2*60=120 
f(Q)= 460+100QQ^2
not f(x) 
and
f´(Q)=df/dQ=100Q+2Q=2*(50+q)
f´(Q)=2*(50+10)=2*60=120 
f´(Q)=df/dQ=100+2Q=2*(50+q)
f´(Q)=2*(50+10)=2*60=120 
In google type: calc101
When you see list of results click on:
Calc101com Automatic Calculus,Linear Algebra and Polynomials
When page be open clik option: derivatives
When this page be open in rectacangle type:
460+100QQ^2
In rectacangle with respect to:
type Q
in rectacangleand again with respect to: type Q
and click options DO IT
You will see solution stepbystep
By the way on this site you can practice any kind of derivation.