IB MAI HL Functions Topic 2.2 Applications of Functions (id: 2432f63cf)

本题目来源于试卷: IB MAI HL Functions Topic 2.2 Applications of Functions，类别为 IB数学

[填空题]
A right cylinder has hei okgv xh+reb f8o5+.h5gh, -b7 nzhvgw ;;c8nqdrt ℎh mm and diameter x mm. The volume of this cylinder is equv; ,-c7q;bg 8w nnhdrzal to 45 $mm^3$.


The total surface area, A, of the cylinder can be expressed as A=$\frac{π}{2}​x^2$+$\frac{k}{x}$​.
1.Find the value of k. k =   
2.Find the value of x that makes the total surface area a minimum.

参考答案: 180±2%


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