Cho a/b = c/d chứng minh a/b = 2a+3c/2a-3c
đúng ko
Cho a/b = c/d chứng minh a/b = 2a+3c/2a-3c
đúng ko
Cho \(\frac{a}{b}=\frac{c}{d}\), Chứng minh rằng \(\frac{2a-3c}{2b-3d}=\frac{2a+3c}{2a+3d}\)
Cho \(\frac{a}{b}=\frac{c}{d}\), Chứng minh rằng \(\frac{2a-3c}{2b-3d}=\frac{2a+3c}{2a+3d}\)
cho tỉ lệ thức \(\frac{a}{b}=\frac{c}{d}\). Chứng minh
a)\(\frac{3a+5b}{3a-5b}=\frac{3c+5d}{3c-5d}\)
b)\(\frac{2a+3b}{2a-3b}=\frac{2c+3d}{2c-3d}\)
1. Chứng minh rằng \(\frac{a}{b}\)= \(\frac{c}{d}\)thì \(\frac{a}{b}\)=\(\frac{a+c}{b+d}\)và \(\frac{a}{b}=\)\(\frac{a-c}{b-c}\)
2. Cho \(\frac{a}{b}=\frac{c}{d}\). Chứng minh \(\frac{2a-3c}{2b-3d}=\frac{2a+3c}{2b+3d}\)
cho \(\frac{a}{b}=\frac{c}{d}\)chứng minh rằng \(\frac{2a-3c}{2b-3d}\)=\(\frac{2a+3c}{2a+3d}\)
nhanh minh tink minh can gap camr on cac ban
cho \(\frac{a}{b}\)=\(\frac{c}{d}\)CMR \(\frac{2a-3c}{2b-3d}\)=\(\frac{2a+3c}{2a+3d}\)
Cho tỉ lệ thức \(\frac{2a+13b}{3a-7b}=\frac{2c+13d}{3c-7d}\) CMR:\(\frac{a}{b}=\frac{c}{d}\)
cho \(\frac{a}{b}=\frac{c}{d}\) . Chứng minh rằng \(\frac{3a-c}{3b-d}=\frac{a+3c}{b+3d}\)
cho a/3= c/d. chứng minh rằng 2a-3c/2b-3d=2a+3c/2a+3d