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Old 6th May 2013, 10:02 AM   #1 (permalink)
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amaths qn

hi, i came a cross this amaths qn, and my brains were fried*....and i was really curious anyway....
*i refuse to admit that some things are difficult....
i think ms word has a big problem with the alpha beta sum of roots thing....
so i will let alpha be a....
and beta be b....
may i know how to expand (a+b)^4?
maybe i shall post the full qn
a+b=3
ab=-5
so i need to solve 1/a^2 and 1/b^2
and i get 19/25....
so i need find what is 1/a^4 and 1/b^4.....
i think im gonna get the qn....i sound so incoherent....
i need to prove things...
and yes, under the copyright rule, i think we can post questions for educational purpose without infringing on copyrights.....
i feel so stupid whenever i cannot solve qns.....
then why do i still post if i do not have the full qn?....i guess, some people may know what i am driving at....

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Old 6th May 2013, 09:02 PM   #2 (permalink)
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Re: amaths qn

Can you clarify what the question is? Pretty sure there's no copyright infringement as long as you type out the question and not post a picture of the question.

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Old 6th May 2013, 09:38 PM   #3 (permalink)
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Re: amaths qn

Originally Posted by Betakuwe View Post
Can you clarify what the question is? Pretty sure there's no copyright infringement as long as you type out the question and not post a picture of the question.
i see.....okay if i have time...

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Old 8th May 2013, 08:05 AM   #4 (permalink)
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Re: amaths qn

Originally Posted by yuko1yuko View Post
hi, i came a cross this amaths qn, and my brains were fried*....and i was really curious anyway....
*i refuse to admit that some things are difficult....
i think ms word has a big problem with the alpha beta sum of roots thing....
so i will let alpha be a....
and beta be b....
may i know how to expand (a+b)^4?
maybe i shall post the full qn
a+b=3
ab=-5
so i need to solve 1/a^2 and 1/b^2
and i get 19/25....
so i need find what is 1/a^4 and 1/b^4.....
i think im gonna get the qn....i sound so incoherent....
i need to prove things...
and yes, under the copyright rule, i think we can post questions for educational purpose without infringing on copyrights.....
i feel so stupid whenever i cannot solve qns.....
then why do i still post if i do not have the full qn?....i guess, some people may know what i am driving at....
Expand (a+b)^4? Simple it is ^4+4a^3b+6a^2b^2+4ab^3+b^4. But it is not needed in this question.

Maybe the main trick here is, (1/a^2+1/b^2)^2=1/a^4+2/(ab)^2+1/b^4, if i understand what you are having difficulty with... that is..

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Old 8th May 2013, 09:47 AM   #5 (permalink)
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Re: amaths qn

Originally Posted by megaman123 View Post
Expand (a+b)^4? Simple it is ^4+4a^3b+6a^2b^2+4ab^3+b^4. But it is not needed in this question.

Maybe the main trick here is, (1/a^2+1/b^2)^2=1/a^4+2/(ab)^2+1/b^4, if i understand what you are having difficulty with... that is..
been feeling moody, will post it up another day....

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Old 8th May 2013, 11:14 AM   #6 (permalink)
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Re: amaths qn

TS, are you suffering from depression? I hardly think your main purpose in creating this thread is to have your maths problems solved, as evidenced from you going around incoherently in circles.

Peace.

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Old 8th May 2013, 12:46 PM   #7 (permalink)
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Re: amaths qn

Originally Posted by whitecorp View Post
TS, are you suffering from depression? I hardly think your main purpose in creating this thread is to have your maths problems solved, as evidenced from you going around incoherently in circles.

Peace.
i'm going to IMH if u are wondering....and i may be suffering from psychotic depression...
and yes, i am not succinct in stating my points.....and i am like some old lady muttering to herself...
its quite surprising that tuition_czar is nicer than u....

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Old 9th May 2013, 09:02 AM   #8 (permalink)
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Re: amaths qn

Originally Posted by yuko1yuko View Post
i'm going to IMH if u are wondering....and i may be suffering from psychotic depression...
and yes, i am not succinct in stating my points.....and i am like some old lady muttering to herself...
its quite surprising that tuition_czar is nicer than u...
I shan't debate this further with you lest I am seen as bullying a mentally malfunctioning entity. Take care.

Peace.

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