Các câu hỏi tương tự
voi a,b,c,d, la cac so duong thoa man a*b = c*d =1 chung minh bat dang thuc : ( a+b )*( c+d ) +4 >= 2*( a+b+c+d ) cac ban oi giup minh voi OK
voi a,b,c,d la cac so duong thoa man a*b = c*d = 1. Chung minh bat dang thuc ( a+b )*( c+d ) + 4 >= 2( a+b+c+d )
cho a,b,c la cac so thuc duong thoa man 21ab+2bc+8ac <= 12
khi do gia ti nho nhat cua A=1/a+2/b +3/c
cho a,b,c la cac so thuc thoa man a+2b-3b=0 va bc +2ac-3ab=o.chung minh a=b=c
cho a,b,c la cac so thuc thoa man a+2b-3b=0 va bc +2ac-3ab=o.chung minh a=b=c
a,b,c la cac so thuc duong thoa man \(\frac{1}{1+a}+\frac{1}{1+b}+\frac{1}{1+c}=2\)
Max P=abc
cho a,b,c la cac so thuc duoong thoa man a+b+c=0. CMR
\(\frac{a^2}{b}+\frac{b^2}{c}+\frac{c^2}{a}\ge3\left(a^2+b^2+c^2\right)\)
cho a,b,c la cac so thuc duong , a+b+c = 1 ; cmr 1/a + 1/b + 1/c >= 9
cho a,b,c la cac so thuc duong nho hon 1 va thoa mân+b+c=2
CMR: \(a^2+b^2+c^2+2abc\ge\frac{52}{27}\)