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 9: Chứng minh đẳng thức : $($ $\frac{\sqrt{x}}{\sqrt{x} -2}$— $\frac{\sqrt{x}}{\sqrt{x} + 2 }$ $)$ $:$ $\frac{\sqrt{4x}}{\sqrt{x} -2}$ $=

Toán Lớp 9: Chứng minh đẳng thức :
$($ $\frac{\sqrt{x}}{\sqrt{x} -2}$— $\frac{\sqrt{x}}{\sqrt{x} + 2 }$ $)$ $:$ $\frac{\sqrt{4x}}{\sqrt{x} -2}$ $=$ $\frac{2}{\sqrt{x }+2}$

Comments ( 2 )

  1. ({\root{}{x}}/{\root{}{x}-2}-{\root{}{x}}/{\root{}{x}+2}):{\root{}{4x}}/{\root{}{x}-2}={2}/{\root{}{x}+2}
    VT=({\root{}{x}}/{\root{}{x}-2}-{\root{}{x}}/{\root{}{x}+2}):{\root{}{4x}}/{\root{}{x}-2}
    =(\root{}{x}({1}/{\root{}{x}-2}-{1}/{\root{}{x}+2}).{\root{}{x}-2}/{2\root{}{x}}
    =4\root{}{x}.{1}/{(\root{}{x}-2)(\root{}{x}+2)}.{\root{}{x}-2}/{2\root{}{x}}
    ={2}/{\root{}{x}+2}=VP

  2. Giải đáp:
     Gửi bạn ạ
    Lời giải và giải thích chi tiết:
     

    toan-lop-9-chung-minh-dang-thuc-frac-sqrt-sqrt-2-frac-sqrt-sqrt-2-frac-sqrt-4-sqrt-2

Leave a reply

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

About Nhi