Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: Ch a/b=c/d chung minh a2+b2/b2+c2=a/b

Toán Lớp 7: Ch a/b=c/d chung minh a2+b2/b2+c2=a/b

Comments ( 1 )

  1. \(\frac{a}{c}=\frac{c}{b}\Rightarrow c^2=ab\)
    ta có: \(\frac{a^2+c^2}{b^2+c^2}=\frac{a^2+ab}{b^2+ab}=\frac{a\left(a+b\right)}{b\left(a+b\right)}=\frac{a}{b}\left(đpcm\right)\)

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Thảo