\(\frac{a}{b}=\frac{b}{c}=\frac{c}{d}=\frac{d}{a}=\frac{a+b+c+d}{a+b+c+d}=1\left(\text{ vì a+b+c+d khác 0}\right)\)
\(\Rightarrow a=b=c=d\)
\(M=\frac{2a-b}{c+b}+\frac{2b-c}{a+d}+\frac{2c-d}{a+b}+\frac{2d-a}{b+c}=\frac{2a-a}{a+a}+\frac{2b-b}{b+b}+\frac{2c-c}{c+c}+\frac{2d-d}{d+d}=\frac{1}{2}.4=2\)
cho a/2b = b/2c = c/2d = d/2a (a,b,c,d>0) .Tinh A = 2011a-2010b/c+d + 2011b-2010c/a+d + 2011c-2010d/a+b + 2011d-2010a/b+c
cho a/2b = b/2c = c/2d = d/2a (a,b,c,d>0) .Tinh A = 2011a-2010b/c+d + 2011b-2010c/a+d + 2011c-2010d/a+b + 2011d-2010a/b+c
co 2a+b+c+d/a = a+2b+c+d/b = a+b+2c+d/c = a+b+c+2d/d
tinh M= a+b/c+d + b+c/d+a + c+d/a+b + d+a/b+c
cho a/b=b/c=c/d=d/a trong đó a+b+c+d khác 0 tính giá trị biểu thức M= 2a-b/c+d+ 2b-c/d+a + 2c-d/a+b + 2d -a/b+c
Cho a/b=b/c=c/d=d/a trong đó a+b+c+d khác 0. Tính giá trị biểu thức M = (2a-b)/(c+d)+(2b-c)/((d+c)+(2c-d)/(a+b)+(2d-a0/(b+c)
cho: 2a+b+c+d/a=a+2b+c+d/b=a+b+2c+d/c=a+b+c+2d/d.Tính M=a+b/c+d + b+c/d+a + c+d/a+b + d+a/b+c
cho a/b=b/c=c/d=d/a
trong đó a+b+c+d khác 0
tính giá trị biểu thức
M=2a-b/c+d+2b-c/d+a+2c-d/a+b+2d-c/b+c
cho 2a+b+c+d / a = a+2b+c+d / b = a+b+2c+d = a+b+c+2d / d
tính M = a+b / c+d + b+c / d+a + c+d / a+b + d+a / b+c
Cho a/2b=b/2c=c/2d=d/2a(a,b,c,d>0)
