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cho ti le thuc \(\frac{a}{b}=\frac{c}{d}\) chung minh rang \(\frac{a+b}{a-b}=\frac{c+d}{c-d}\)
Cho\(\frac{a}{c}=\frac{c}{b}\)Chung minh rang \(\frac{a^2+c^2}{b^2+c^2}=\frac{a}{b}\)
cho tỉ lệ thức : \(\frac{a}{b}\)= \(\frac{c}{d}\). Chung minh rang : (a+2c)(b+d)=(a+c)(b+2d)
cho ti le thuc \(\frac{a}{c}=\frac{a}{d}\)Chung to rang \(\frac{a}{b+c}=\frac{a}{b+d}\)
Cho \(\frac{a}{b}\)= \(\frac{c}{d}\)chung minh rang
a ) \(\frac{a}{a-b}\)= \(\frac{c}{c-d}\)
b ) \(\frac{a}{b}\)= \(\frac{a+c}{b+d}\)
c ) \(\frac{a}{3.a+b}\)= \(\frac{c}{3.c+d}\)
cho \(\frac{a}{c}=\frac{c}{b}\).Chung minh rang: \(\frac{a^2+c^2}{b^2+c^2}=\frac{a}{b}\)
cho \(\frac{a}{c}=\frac{c}{b}\) chung minh rang \(\frac{b^2-a^2}{a^2+c^2}=\frac{b-a}{a}\)
cho\(b^2=ac\)chung minh rang\(\frac{a^2+b^2}{b^2+c^2}=\frac{a}{c}\)
giup em voi
cho ti le thuc \(\frac{a+b}{b+c}=\frac{c+d}{d+a}\)
chung minh rang |a| = |c| hoac |a+b| +|c=d|
ai lam nhanh nhat, dung nhat em tick choa
