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$9\sqrt{3-\frac{2}{x}}-7-14\sqrt{3x-2}+12x\geq 0$

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vutung97

vutung97

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1. CMR  với mọi x thuộc $\left [ \frac{2}{3};1 \right ]$

 $$9\sqrt{3-\frac{2}{x}}-7-14\sqrt{3x-2}+12x\geq 0$$

2. CMR  với mọi x thuộc $\left [ 0;1 \right ]$

a) $$2a^5 + 2a^4 - 8a^3+3a^2+3a-2\leq 0$$

b) $$2a^4+4a^3-4a^2-a+2\geq 0$$


Edited by vutung97, 25-06-2015 - 00:32.





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