cho a/2b = b/2c = c/2d = d/2a (a,b,c,d>0)
Cho \(\frac{a+2c}{b+2d}=\frac{2a+c}{2b+d}\) .
CMR : \(\frac{a}{b}=\frac{a+c}{b+d};\frac{2a-c}{2b-d}=\frac{a-2c}{b-2d};\frac{a+2b}{a-b}=\frac{c+2d}{c-d}\)
cho a , b , c , d > 0 thỏa mãn : a/2b = b/2c = c/2d = d/2a
tính A = 2011a - 2010b / c+d + 2011b -2010c / d+a + 2011c- 2010d / a+b + 2011d
Cho \(\dfrac{a}{b}=\dfrac{c}{d}\left(b,d\ne0\right)\).Chứng minh rằng
\(\dfrac{2a+b}{2a-b}=\dfrac{2c+d}{2c-d}\)
\(\dfrac{2a+b}{a-2b}=\dfrac{2c+d}{c-2d}\)
cho a/b=b/c=c/d=d/a va a+b+c khac 0.
Tinh M = 2a-b/c+d + 2b-c/a+d + 2c-d/a+b + 2d-a/b+c
Cho:\(\frac{a}{b}=\frac{b}{c}=\frac{c}{d}=\frac{d}{a}\)
Tính: P\(\frac{2a-b}{2c-d}+\frac{2b-c}{2d-a}+\frac{2c-d}{2a-b}+\frac{2d-a}{2b-c}\)
Giúp với ai nhanh mình tick cho.
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
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