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chingching
Joined: 17 Nov 2004Posts: 7
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Posted: Thu Nov 18, 2004 8:16 pm Post subject: an integal problem
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how to slove this problem? find the volume of the solid generated by revolving the reigon bounded by y=x^2 and y=8x about the y-axis by the shell method.
it is the book question. who can teach me to slove it~~”
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Wilson
Frequent VisitorJoined: 20 Oct 2004Posts: 74
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Posted: Fri Nov 19, 2004 2:15 pm Post subject: Re: an integal problem
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Let Put f(x) = 0, we have roots 0 and 8. The required volume
Actually, there is another method as follow: The require volume
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Chan Pak Keung
Joined: 09 May 2004Posts: 16
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Posted: Sat Nov 20, 2004 11:37 pm Post subject:
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I am sorry to tell you that your question is not “Advanced Maths”, so
please post it on “High School Maths” next time.
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chingching
Joined: 17 Nov 2004Posts: 7
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Posted: Mon Nov 22, 2004 7:09 pm Post subject: thx
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thx at first but it is very sorry that no one can answer this question in high
sch. maths……
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chingching
Joined: 17 Nov 2004Posts: 7
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Posted: Mon Nov 22, 2004 7:19 pm Post subject: a difficult thing
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but why my bk. can make the ans. be 24*(pi)/5?
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victorcheng
Joined: 16 Mar 2004Posts: 11
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Posted: Thu Dec 09, 2004 4:30 pm Post subject: Re: a difficult thing
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chingching wrote:
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but why my bk. can make the ans. be
24*(
pi)/5?
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i think if the answer in the book is correct, the second function should be y^2=8x
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