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: 2 √3= $\frac{2√x}{x}$ Giúp mình với

Toán Lớp 9: 2 √3= $\frac{2√x}{x}$
Giúp mình với

Comments ( 2 )

  1. ĐKXĐ: x>0
    2\sqrt{3}=(2\sqrt{x})/x
    <=>2x\sqrt{3}=2\sqrt{x}
    <=>2x\sqrt{3}-2\sqrt{x}=0
    <=>2\sqrt{x}(\sqrt{3x}-1)=0
    <=>[(2\sqrt{x}=0),(\sqrt{3x}-1=0):}
    <=>[(\sqrt{x}=0),(\sqrt{3x}=1):}
    <=>[(x=0(\text{loại})),(3x=1):}
    <=>x=1/3(t//m)
    Vậy S={1/3}

Leave a reply

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

About Lan Anh