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: 3/5.8+3/8.11+3/11.14+-+3/95+98. Giúp mik với nha

Toán Lớp 6: 3/5.8+3/8.11+3/11.14+….+3/95+98. Giúp mik với nha

Comments ( 2 )

  1. ~ Bạn tham khảo ~
    Đặt A = 3/(5.8) +3/(8.11)+3/(11.14) + …. + 3/(95.98)
    A = 1/(5.8) + 1/(8.11)+1/(11.14)+….+1/(95.98)
    A =   1/5-1/8+1/8-1/11+1/11-1/14+…+1/95-1/98)
    A = ( 1/5 – 1/98)
    A =  93/490
    $#Vịt vàng$

  2. Đặt
    S = 3/(5.8) + 3/(8.11) + 3/(11.14) + … + 3/(95.98)
    S = 1/5 – 1/8 + 1/8 – 1/11 + 1/11 – 1/14 + … + 1/95 – 1/98
    S = 1/5 – 1/98
    S = 93/490
     

Leave a reply

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