\(\sqrt{5a}.\sqrt{45a}-3a=\sqrt{5a}.\sqrt{9.5a}-3a\)\(=5a.3-3a=12a\)
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\(\sqrt{5a}.\sqrt{45a}-3a=\sqrt{5a}.\sqrt{9.5a}-3a\)\(=5a.3-3a=12a\)
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Giúp mình với mình cần gấp!!!
Cho a,b,c>0 thỏa mãn a+b+c=1
CMR: \(\left(\frac{1}{a}-1\right)\left(\frac{1}{b}-1\right)\left(\frac{1}{c}-1\right)\ge8\)
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