Các câu hỏi tương tự
cho a,b,c la 3 canh cua tam giac cmr a/(b+c-a)+b/(a+c-b)+c/(a+b-c) a^2+b^2+c^2
cho a,b,c la 3 canh cua tam giac
tm (a+b-2c)^2+(b+c-2a)^2+(c+a-2b)^2=(a-b)^2+(b-c)^2+(c-a)^2. tam giac ay la tam giac gi
cho a,b,c la 3 canh cua mot tam giac cmr
A=\(\frac{a}{b+c-a}+\frac{b}{a+c-b}+\frac{c}{a+b-c}\)
lon hon hoac bang 3
làm ơn giúp tui với
cho a ,b,c la do dai 3 canh cua tam giac
cmr: a2+b2+c2+2bc>0
Cho a,b,c la ba canh cua tam giac
CMR ab+bc+ca<=a^2+b^2+c^2<2(ab+bc+ca)
Bai 1:cho a,b,c la do dai 3 canh tam giac
CMR a^2016/b+c-a + b^2016/c+a-b + c^2016/a+b-c >= a^2015 +b^2015+c^2015
Bai 2;cho a,b,c la cac so thuc thoa man:0<=a,b,c<=4 va a+b+c=6
tim GTLN P=a^2+b^2+c^2 +ab+bc+ca
Cho a, b, c la do dai ba canh cua mot tam giac . Chung minh rang :
\(\frac{1}{a+b-c}+\frac{1}{a+c-b}+\frac{1}{b+c-a}\ge\frac{1}{a+b+c}\)
cho tam giac co do dai 3 canh a , b ,c thoa man
\(\left(a+b-c\right)^3+\left(b+c-a\right)^3+\left(c+a-b\right)^3=a^3+b^3+c^3\)
chung minh tam giac do la tam giac deu
cho a,b,c la ba canh cua tam giac.
Chung minh :\(\frac{ab}{a+b-c}+\frac{bc}{-a+b+c}+\frac{ac}{a-b+c}\ge a+b+c\)