英文的导数数学题,(1 pt) The total cost (in dollars) of producing coffee machines isC(x)=1900+70x-0.7x^2(A) Find the exact cost of producing the 21st machine.Exact cost of 21st machine = (B) Use marginal cost to approximate the cost of produci

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英文的导数数学题,(1pt)Thetotalcost(indollars)ofproducingcoffeemachinesisC(x)=1900+70x-0.7x^2(A)Findtheexactc

英文的导数数学题,(1 pt) The total cost (in dollars) of producing coffee machines isC(x)=1900+70x-0.7x^2(A) Find the exact cost of producing the 21st machine.Exact cost of 21st machine = (B) Use marginal cost to approximate the cost of produci
英文的导数数学题,
(1 pt) The total cost (in dollars) of producing coffee machines is
C(x)=1900+70x-0.7x^2
(A) Find the exact cost of producing the 21st machine.
Exact cost of 21st machine =
(B) Use marginal cost to approximate the cost of producing the 21st machine.
Approx.cost of 21st machine =

英文的导数数学题,(1 pt) The total cost (in dollars) of producing coffee machines isC(x)=1900+70x-0.7x^2(A) Find the exact cost of producing the 21st machine.Exact cost of 21st machine = (B) Use marginal cost to approximate the cost of produci
(A)
Exact cost of 21st machine = C(21)-C(20)=3161.3-3120=41.3


(B)
MC(x)=70-1.4x
Approx.cost of 21st machine =MC(20)=70-1.4×20=42

英文的导数数学题,(1 pt) The total cost (in dollars) of producing coffee machines isC(x)=1900+70x-0.7x^2(A) Find the exact cost of producing the 21st machine.Exact cost of 21st machine = (B) Use marginal cost to approximate the cost of produci 英文的导数数学题,求步骤,解题过程(1 pt) The total profit (in dollars) from the sale of charcoal grills isP(x)=30x-0.3x^2-215(A) Find the average profit per grill if 40 grills are produced. Ave. profit = Find the marginal average profi 关于导数的数学题 英文里的INC、PT、CN是什么意思 磅到底是重量单位还是长度单位啊?长度的磅是pt重量的磅英文是什么呢?pt是1/72英寸, 导数的数学题要详解 PT私人教练的英文详写是什么? ai里150px等于多少pt请问ai里的1pt=多少px150px=多少pt? 英文形式中 pt.op. 一道导数的数学题求解释 请帮我做下偏导数的数学题 蛛网模型的数学推理,为什么会有 Pe=Pt=Pt-1? 高压pt柜的pt是什么意思? 若有以下定义和语句,则对a数组元素非法引用的是:int a[2][3],(*pt)[3];pt=a;A.pt[0][0] B.*(pt+1)[2] C.*(pt[1]+2) D.*(a[0]+2) PT的作用是什么 高等数学题：求函数的导数 高等数学题：求函数的导数 英文的数学题 关于导数和微分的两个题目当x=0的时候,F(x)=c;我看到书上的答案在这里F(x)的导数是1,请问为什么呢?第2个题目,已知直线PT与光滑曲线r=r(Q)相切于点M.证明：矢径OM于PT所成之角e=arctan(r(Q)/r(Q)的导