\(\frac{a}{ab+a+2016}+\frac{b}{bc+b+1}+\frac{2016c}{ac+2016c+2016}\)
\(=\frac{a}{ab+a+abc}+\frac{b}{bc+b+1}+\frac{abc^2}{ac+abc^2+abc}\)
\(=\frac{a}{a.\left(b+1+bc\right)}+\frac{b}{bc+b+1}+\frac{abc^2}{ac.\left(1+bc+b\right)}\)
\(=\frac{1}{b+bc+1}+\frac{b}{b+bc+1}+\frac{bc}{b+bc+1}\)
\(=\frac{1+b+bc}{b+bc+1}=1\)
cho a+b+c=2016. CMR:(2016a+bc)(2016b+ac)(2016c+ab)=(a+b)^2(b+c)^2(c+a)^2
cho a.b.c = 2016 tính : \(\frac{a}{ab+a+2016}+\frac{b}{bc+b+1}+\frac{2016.c}{a.c+2016.c+2016}\)
Cho a.b.c=1
CMR \(\frac{1}{1+ab}+a+\frac{1}{1+bc}+b+\frac{1}{1+ac}+c=1\)
cho a,b,c>0 thỏa mãn abc=1.chứng minh \(\frac{1}{a^{2016}+b^{2016}+1}+\frac{1}{b^{2016}+c^{2016}+1}+\frac{1}{c^{2016}+a^{2016}+1}\le1\)
Cho \(\frac{x^2}{a^2}+\frac{y^2}{b^2}+\frac{z^2}{c^2}=\frac{x^2+y^2+z^2}{a^2+b^2+c^2}\).Chứng minh \(\frac{x^{2016}}{a^{2016}}+\frac{y^{2016}}{b^{2016}}+\frac{z^{2016}}{c^{2016}}=\frac{x^{2016}+y^{2016}+z^{2016}}{a^{2016}+b^{2016}+c^{2016}}\)
cho \(a^2+b^2+c^2=ab+bc+ca\)(a,b,c thuộc R;khác 0)
tính:\(P=\frac{a^4}{b^4}+\frac{b^4}{c^4}+\frac{c^{2016}}{a^{2016}}\)
Cho A=\(\frac{4bc-a^2}{bc+2a^2}\),B=\(\frac{4ca-b^2}{ac+2b^2}\),C=\(\frac{4ab-c^2}{ab+2c^2}\).CMR nếu a+b+c=0 thì A.B.C=1
Cho a.b.c=1
CMR \(\frac{1}{1+ab}\)+ a + \(\frac{1}{1+bc}\)+ b + \(\frac{1}{1+ac}\)+c =1
Cho phân thức A=\(\frac{4bc-a^2}{bc+2a^2}\);B=\(\frac{4ca-b^2}{ca+2b^2}\);C=\(\frac{4ab-c^2}{ab+2c^2}\)
Cmr nếu a+b+c=0 a khác b khác c thì A.B.C=1
Bạn nào giải nhanh đúng mình tick cho nha ^ ^.
