Các câu hỏi tương tự
Cho a+b+c=1 Tìm giá trị biểu thức
B=\(\frac{a-b}{b+1+2c}\)+\(\frac{3b+4c}{c-a+2}\)-\(\frac{c}{3-2a-b}\)
Cho a, b, c thỏa \(\frac{a}{2a+3b+4c}+\frac{3b}{6b+4c+a}+\frac{4c}{8c+a+3b}=\frac{3}{4}.\)
Chứng minh rằng: \(\frac{a^2}{2a+3b+4c}+\frac{9b^2}{6b+4c+a}+\frac{16c^2}{8c+a+3b}=\frac{a+3b+4c}{4}\)
Cho a,b,c>0 CMR:\(\frac{a}{3a^2+2b^2+c^2}+\frac{b}{3b^2+2c^2+a^2}+\frac{c}{3c^2+2a^2+b^2}\le\frac{1}{6}\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\right)\)
Cho a;b;c là các số dương thay đổi thỏa mãn \(\frac{1}{a+b}+\frac{1}{b+c}+\frac{1}{c+a}=2017\)
TÍNH \(MaxP=\frac{1}{2a+3b+3c}+\frac{1}{3a+2b+3c}+\frac{1}{3a+3b+2c}\)
cho a,b,c >0
CMR:\(\frac{a}{3a^2+2b^2+c^2}+\frac{b}{3b^2+2c^2+a^2}+\frac{c}{3c^2+2a^2+b^2}\le\frac{1}{6}\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\right)\)
a) Cho a,b,c>0. chứng minh rằng:\(\frac{a}{3a^2+2b^2+c^2}+\frac{b}{3b^2+2c^2+a^2}+\frac{c}{3c^2+2a^2+b^2}\le\frac{1}{6}\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\right)\)
\(\frac{a}{3a^2+2b^2+c^2}+\frac{b}{3b^2+2c^2+a^2}+\frac{c}{3c^2+2a^2+b^2}\le\frac{1}{6}\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\right)\)
Cho a, b, c \(\ne\)0 thỏa mãn \(\frac{1}{a}+\frac{1}{b}-\frac{1}{c}=0\). Tính : \(E=\frac{a^2b^2c^2}{a^2b^2+b^2c^2-a^2c^2}+\frac{a^2b^2c^2}{b^2c^2+c^2a^2-a^2b^2}+\frac{a^2b^2c^2}{c^2a^2+a^2b^2-b^2c^2}.\)
cho a,b,c>0 thỏa mãn a+b+c=2016
Tìm GTNN P=\(\frac{2a+3b+3c+1}{2015+a}+\frac{3a+2b+3c}{2016+b}+\frac{3a+3b+2c-1}{2017+c}\)