cho tỉ lệ thức \(\dfrac{a}{b}=\dfrac{c}{d}\)(b\(\ne\)0;d\(\ne\)0)

e)\(\dfrac{2014a-2015b}{2016a+2017b}=\dfrac{2014c-2015d}{2016c+2017d}\)

f)\(\dfrac{7a^2+3ab}{11a^2-8b^2}=\dfrac{7c^2+3cd}{11c^2-8d^2}\)

cho tỉ lệ thức \(\dfrac{a}{b}=\dfrac{c}{d}\)(b\(\ne\)0;d\(\ne\)0)

c)\(\dfrac{ab}{cd}=\dfrac{\left(a+b\right)^2}{\left(c+d\right)^2}\)

d)\(\dfrac{3c^2+5a^2}{3d^2+5b^2}=\dfrac{c^2}{d^2}\)

cho tỉ lệ thức \(\dfrac{a}{b}=\dfrac{c}{d}\)(b\(\ne\)0;d\(\ne\)0)

a) \(\dfrac{a-b}{b}=\dfrac{c-d}{d}\)

b)\(\dfrac{a+b}{a}=\dfrac{c+d}{d}\)

c)\(\dfrac{ab}{cd}=\dfrac{\left(a+b\right)^2}{\left(c+d\right)^2}\)

b)\(\dfrac{a+b}{a}=\dfrac{c-d}{d}\)

a)\(\dfrac{a-b}{b}=\dfrac{c-d}{d}\)

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