Cho ba so a,b,c doi mot khac nhau va a+b/c=b+c/a=c+a/b .
Tinh gia tri cua bieu thuc :
M=(1+b/c)(1+c/a)(1+a/b)
giai chi tiet giup minh nha!
Cho ba so a,b,c doi mot khac nhau va a+b/c=b+c/a=c+a/b .
Tinh gia tri cua bieu thuc :
M=(1+b/c)(1+c/a)(1+a/b)
giai chi tiet giup minh nha!
nhanh gium minh nhe!
Cho cac so thuc phan a,b,c khac nhau doi mot va thoa man a^2-b=b^2-c=c^2-a . CMR (a+b+1)()b+c+1(c+a+1)=-1- de hsg tinh mon toan 9 nam 2012
cho a,b,c khac nhau doi mot va 1/a+1/b+1/c=0.rut gon cac bieu thuc
N=bc/a^2+2bc+CA/B^2+2AC+AB/C^2+2AB
cho 2 bieu thuc A=x+x^2/2-x va B=2x/x+1+3/x-2-2x^2+1/x^2-x-2 a, tinh gia tri cua A khi /2x-3/=1 b,tim dieu kien xac dinh va rut gon bieu thuc B c,tim so nguyen x de P=A.B dat gia tri lon nhat
mk dang can gap
Cho bieu thuc A = ( 1/ x^2 - x + 1/x-1):x+1/x^2 -2x +1 ( x khac 0;1;-1)
a) Rut gon bieu thuc A
b) Tinh gia tri bieu thuc A khi x=2014/2013
c)Tim dieu kien cua x de A co gia tri lon hon 1
cho a^3+b^3+c^3=3abc va a+b+c khac 0 . tinh gia tri bieu thuc N=\(\frac{a^2+b^2+c^2}{\left(a+b+c\right)^2}\)
cho ba số a,b.c khac 0 va thoa man a+b+c =0 tinh gia tri cua bieu thuc P=1/a2+b2-c2 + 1/b2+c2-a2 + 1/c2+a2-b2
cho a+b+c=0; ab+bc+ca=0. tinh gia tri cua bieu thuc A=(a-1)^2008+b^2009+(c+1)^2010