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#1 2009-12-23 10:01:38
- Identity
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- Registered: 2007-04-18
- Posts: 934
proof of cauchy schwarz
Can someone please help me wih this proof of Cauchy-schwarz?
It says "the quadratic equation in lambda has no real solution"
But why is that?
thanks
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#2 2009-12-23 10:26:43
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: proof of cauchy schwarz
Because its graph lies completely above the x-axis and does not intersect it.
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#3 2009-12-23 13:45:07
- Identity
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- Registered: 2007-04-18
- Posts: 934
Re: proof of cauchy schwarz
ah, ok thanks jane 
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