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[tex]a^2 - b^2 - c^2 - d^2 > 0[/tex]

[tex]A^2 - B^2 - C^2 - D^2 = 1[/tex]

[tex]A > 1[/tex]

[tex]a > 0[/tex]

Prove or disprove [tex]Aa + Bb + Cc + Dd > 0[/tex]

after 3 days of trying I give up

can anyone give a clue?

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# Homework Help: Prove or disprove this inequality

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