Rates of Change (1 Viewer)

[Avenger6]

Hi, i'm struggling with finding the derivative for this question and hence finding the equation for the rate of change, any help is greatly appreciated .

 

[vds700]

Hi, i'm struggling with finding the derivative for this question and hence finding the equation for the rate of change, any help is greatly appreciated .

P = 100/v = 100v^-1
dP/dv = -100v^-2
= -100/v²
when v = 20, dP/dv = -100/(20)²
=-100/400
=-1/4

 

[Avenger6]

Of course...thanks alot .