The volume of a cylinder is 63 pi inches cubed and its radius is 3in.
a) work backwards to find the heigh of the cylinder
b) find the lateral area of the cylinder

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Ответ:

tejasheree

01.11.2020

Mathematics

x=2, f(x)=-4

Step-by-step explanation:

Given

f(x)=9x^2-36x+32

Solving it, add and subtract 4 to it

$\Rightarrow f(x)=9x^2-36x+36-4\\\Rightarrow f(x)=(3x)^2+(6)^2-2\times 3x\times 6-4\\\Rightarrow f(x)=(3x-6)^2-4\\\\\text{here minimum value of }\ (3x-6)^2\ \text{is 0 for x=2}\\\text{so mnimum value of }\ (3x-6)^2-4\ \text{is}\ -4$

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The volume of a cylinder is 63 pi inches cubed and its radius is 3in. a) work backwards to find the heigh of the cylinder b) find the lateral area of the cylinder