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

Toán Lớp 7: $\frac{x+4}{2008}$ + $\frac{x+3}{2009}$ = $\frac{x+2}{2010}$ + $\frac{x+1}{2011}$

Home/ Toán Lớp 7: $\frac{x+4}{2008}$ + $\frac{x+3}{2009}$ = $\frac{x+2}{2010}$ + $\frac{x+1}{2011}$

Toán Lớp 7: $\frac{x+4}{2008}$ + $\frac{x+3}{2009}$ = $\frac{x+2}{2010}$ + $\frac{x+1}{2011}$

Tháng Bảy 23, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: $\frac{x+4}{2008}$ + $\frac{x+3}{2009}$ = $\frac{x+2}{2010}$ + $\frac{x+1}{2011}$

Comments ( 2 )

  1. dongoctuan
    dongoctuan
    23 Tháng Bảy, 2022 at 10:44 sáng
    Reply
    Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-7-frac-4-2008-frac-3-2009-frac-2-2010-frac-1-2011

  2. thudan
    thudan
    23 Tháng Bảy, 2022 at 10:43 sáng
    Reply
    ( x + 4 )/2008 + ( x + 3 )/2009 = ( x + 2 )/2010 + ( x + 1 )/2011
    ( x + 4 )/2008 + 1 + ( x + 3 )/2009 + 1 = ( x + 2 )/2010 + 1 + ( x + 1 )/2011 + 1
    ( x + 2012 )/2008 + ( x + 2012 )/2009 = ( x + 2012 )/2010 + ( x + 2012 )/2011
    ( x + 2012 )( 1/2008 + 1/2009 – 1/2010 – 1/2011 ) = 0
    => x = -2012
    @ Rin

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

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