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 8: (x-1/x+1-x+1/x-1):1/x-1 giúp mình

Tháng Hai 11, 2023 Toán học 2 Comments 0 views

Toán Lớp 8: (x-1/x+1-x+1/x-1):1/x-1 giúp mình

Comments ( 2 )

  1. cobelolen
    cobelolen
    11 Tháng Hai, 2023 at 2:33 chiều
    Reply
    ~ Ban tham khảo ~
    ([x-1]/[x+1]-[x+1]/[x-1]):1/[x-1]
    =([(x-1)(x-1)]/[x^2-1]-[(x+1)(x+1)]/[x^2-1]):1/[x-1]
    =[(x-1)(x-1)-(x+1)(x+1)]/[x^2-1]:1/[x-1]
    =[(x^2-2x+1)-(x^2+2x+1)]/[x^2-1]*x-1
    =[x^2-2x+1-x^2-2x-1]/[x^2-1]*x-1
    =[-4x(x-1)]/[x^2-1]
    =[-4x(x-1)]/[(x-1)(x+1)]
    =[-4x]/[x+1]

  2. giangnguyen33
    giangnguyen33
    11 Tháng Hai, 2023 at 2:33 chiều
    Reply
    #AkaShi
    ((x-1)/(x+1)-(x+1)/(x-1)):1/(x-1)
    =[((x-1)^2)/((x-1)(x+1))-((x+1)^2)/((x-1)(x+1))]*(x-1)/1
    =((x-1)^2-(x+1)^2)/((x+1)(x-1))*(x-1)/1
    =((x-1-x-1)(x-1+x+1))/((x-1)(x+1))*(x-1)/1
    =(-2.2x)/((x+1)(x-1))*(x-1)/1
    =(-4x)/(x+1)

Leave a reply

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

Trang Ðài

About Trang Ðài