Thread: Inequality/subst qn
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Old November 5th, 2008, 11:32 PM
zeromeyzl zeromeyzl is offline
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Default Inequality/subst qn
By using the subst u = e^(-x/2) or otherwise (pls don't do otherwise!) solve inequality e^-x > 4e^-(x/2) + 4

My ans is x < -2 ln (2+2sqrt2)...not sure if correct!
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