Chứng minh (2016a-2017b)/(2017c+2018d)=(2016c-2017d)/(2017a+2018b) - Nguyễn Minh Hải
Bài 1 cho \(\frac{a}{b}=\frac{c}{d}\)chứng minh
d) \(\frac{2a+5b}{3a-4b}=\frac{2c+5d}{3c-4d}\)
e) \(\frac{2016a-2017b}{2017c+2018d}=\frac{2016c-2017d}{2017a+2018b}\)
Bài cúi thả like :) Cho a/b=c/d CMR a) a+b/c+d=a-b/c-d b) 2017a+2018b/2017c+2018d =2017a-2018b/2017c-2018d
Cho \(\frac{a}{2b}=\frac{b}{2c}=\frac{c}{2d}=\frac{d}{2a},\left(a,b,c>0\right)\)
Tính giá trị biểu thức C=\(\frac{2017a-2016b}{c+d}+\frac{2017b-2016c}{a+d}+\frac{2017c-2016d}{a+b}+\frac{2017d-2016a}{b+c}\)
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 \(\frac{a}{b}=\frac{c}{d}\).CMR \(\frac{2017-2018b}{2018a+2019b}=\frac{2017c-2018d}{2018c+2019d}\)
Cho \(\frac{a}{b}\) =\(\frac{c}{d}\)CMR \(\frac{2017a+2018b}{2017c+2018d}\)tất cả mũ 3=\(\frac{a^3-b^3}{c^3-d^3}\)
Giúp mik nhé sắp thi HK1 rùi!
Cho \(\frac{a}{b}\)= \(\frac{c}{d}\)CMR \(\frac{2017a+2018}{2018a-2019b}\)= \(\frac{2017c+2018d}{2018c-2019d}\)
Cho a, b, c, d là các số dương thỏa mãn \(\frac{a}{2b}=\frac{b}{2c}=\frac{c}{2d}=\frac{d}{2a}\)
Tính giá trị biểu thức: \(M=\frac{2020a-2018b}{c+d}-\frac{2019b+2017c}{a+d}+\frac{2017c-2019d}{a+b}-\frac{2018d+2020a}{b+c}\)
Cho các số a, b, c thoả mãn b mũ 2=ac.Chứng minh a/c=(a+2017b)mũ 2/(b+2017c)mũ 2
