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 6: Tìm x (x+1)+(x+2)+…+(+100)=5050

Toán Lớp 6: Tìm x
(x+1)+(x+2)+…+(+100)=5050

Comments ( 2 )

  1. (x+1)+(x+2)+…+(+100)=5050
     100x + (1 + 2 + … + 100)=5050

     100x + 5050=5050
     100x             =5050 – 5050
     100x             =0
     100x             =0 : 100
           x             =0
     Vậy x=0
      

  2. Giải:
    (x + 1) + (x + 2) + .. + (x + 100) = 5050
    -> x + 1 + x + 2 + … + x + 100 = 5050
    -> 50x + (1 + 2 + 3 + .. + 100) = 5050
    Ta có: 1 + 2 + 3 + … + 100 = (100 + 1) xx 100 : 2 = 5050
    Do đó, 50x + 5050 = 5050
    -> 50x = 0
    -> x = 0
    Vậy x = 0
     

Leave a reply

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

About Tùy Linh