\(\frac{2a+3b}{2a-3b}=\frac{2c+3d}{2c-3d}\Rightarrow\frac{2a+3b}{2c+3d}=\frac{2a-3b}{2c-3d}=\frac{2a+3b+2a-3b}{2c+3d+2c-3d}=\frac{a}{c}\) (1)
\(\frac{2a+3b}{2c+3d}=\frac{2a-3b}{2c-3d}=\frac{2a+3b-2a+3b}{2c+3d-2c+3d}=\frac{b}{d}\) (2)
Từ (1) và (2) \(\Rightarrow\frac{a}{c}=\frac{b}{d}\Rightarrow\frac{a}{b}=\frac{c}{d}\left(dpcm\right)\)
cho a/b=c/d .C/M 2a+3b/2a-3b=2c+3d/2c-3d
Cho a/b=c/d CMR 2a-3b/2a+3b=2c-3d/2c+3d
Cho a/b=c/d. Chứng minh 2a+3b/2a-3b=2c+3d/2c-3d
Cho a/b=c/d. Chứng minh rằng : 2a+3b/2a-3b = 2c+3d/2c-3d
. Cho a/b = c/d với a, b, c, d > 0. Chứng minh rằng \(\dfrac{2a-3b}{2a+3b}=\dfrac{2c-3d}{2c+3d}\)
Cho (2a+3b) / (2a - 3b) = (2c+3d) / (2c - 3d)
Chứng minh rằng: a/b = c/d
a/b = c/d chứng minh rằng 2a+3b / 2a-3b=2c+3d/2c-3d
Cho a/b=c/d, chứng minh rằng: 2a+3b/2c+3d=2c+3d/2c-3d
cho \(\frac{a}{b}=\frac{c}{d}\)chứng minh
\(\frac{2a-3b}{2a+3b}=\frac{2c-3d}{2c+3d}\)
