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marginal profit is given by P'(x) what do you have for the derivative of P(x) ?
that's all they gave me
I'm not asking you to give me more info, I'm asking you to take the derivative of P(x) to find the marginal profit function P'(x)
does that mean you don't know how to take the derivative of P(x) ?
I know how I was just moving to a different problem since you left the question
but im finding the deriv now
I get an update when you respond, don't worry about what question I'm viewing. I'll be here to check your progress.
f'(x) = -0.0001x+50
the first term is wrong -0.01x^2 derivative is -0.01(2x)=-0.02x
oh the x is by itself
i multiplied 2 and o.oo1
you wrote -0.01x^2 in the problem in any event, find the derivative and then plug in the given value f'(4000)=?
so f'(x)= -0.01(4000)+50
equals the answer
I'm not sure, you told me the function was a few different things, but at least the idea is right: find derivative, plug in number