cho tỉ lệ thức a/b=c/d .CMR:a2/b2=3a2-2ac/3b2-2bd
nếu a/b=c/d suy ra a^2/b^2=3a^2-2ac/3b^2-2bd
Cho a / b =c /d . c/m rằng
a^2 /b^2 = 3a^2 -2ac / 3b^2 -2bd
giúp mình nha ,thanks nhìu
Cho tỉ lệ thức: \(\frac{a}{b}=\frac{c}{d}\). Chứng minh rằng:
\(\frac{a^2}{b^2}=\frac{3a^2-2ac}{3b^2-2bd}\)
cmr (a+b+c)^2 = a^2+b^2+c^2+2ab+2ac+2bc
cmr ( a+b+c)^2= a^2+b^2+c^2+2ab+2ac+2bc
Cho \(\frac{a}{b}=\frac{c}{d}\).Chứng tỏ:
\(\frac{a^2}{b^2}=\frac{3a^2-2ac}{3b^2-2bd}\)
Cho a/b = c/d. Chứng minh:
a) \(\frac{\left(a+c\right)^2}{\left(b+d\right)^2}=\frac{ac}{bd}\)
b) \(\frac{a^2}{b^2}=\frac{3a^2-2ac}{3b^2-2bd}\)
cho a/b=c/d
cmr:a+3b/a-3b=c+3d/c-3d
cmr:a2+b2/b2+d2=ac/bd
cmr:(a+b)2/(c+d)2=ab/cd