Lai rai nào
a) $x\sqrt{x}+\sqrt{x+12}=m(\sqrt{5-x}+\sqrt{4-x})$
b) $\sqrt{3+x}+\sqrt{6-x}-\sqrt{(3+x)(6-x)}=m$
c) $tg^{2}(x)+cotg^{2}(x)+m[tg(x)+cotg(x)]+3=0$
d) $\frac{cos^{6}x+sin^{6}x}{cos^{2}x-sin^{2}x}=m. tg2x$
Lai rai nào
a) $x\sqrt{x}+\sqrt{x+12}=m(\sqrt{5-x}+\sqrt{4-x})$
b) $\sqrt{3+x}+\sqrt{6-x}-\sqrt{(3+x)(6-x)}=m$
c) $tg^{2}(x)+cotg^{2}(x)+m[tg(x)+cotg(x)]+3=0$
d) $\frac{cos^{6}x+sin^{6}x}{cos^{2}x-sin^{2}x}=m. tg2x$
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