Math Is Fun Forum
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#1 2013-01-02 21:22:20
- freddogtgj
- Member
- Registered: 2006-12-02
- Posts: 54
Help please
Hi, I would like your help in proving the following:
Your help is much appreciated.
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#2 2013-01-03 00:07:10
- scientia
- Member
- Registered: 2009-11-13
- Posts: 224
Re: Help please
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#3 2013-01-03 01:22:25
- freddogtgj
- Member
- Registered: 2006-12-02
- Posts: 54
Re: Help please
Sorry it has been a while since I have done any proper maths. Could you provide the solution please?
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#4 2013-01-03 01:58:28
- scientia
- Member
- Registered: 2009-11-13
- Posts: 224
Re: Help please
Substitute
into
then rearrange to the form I gave in my hint.
Not that difficult, I hope? 
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#5 2013-01-03 02:02:48
- gAr
- Member
- Registered: 2011-01-09
- Posts: 3,482
Re: Help please
Hi,
Or perhaps we can use the discriminant >= 0, by solving the quadratic in x?
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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