Toán Tìm x biết: x+4/2000+(x+3/2001)=x+2/2002+(x+1/2003) 17/09/2021 By Valentina Tìm x biết: x+4/2000+(x+3/2001)=x+2/2002+(x+1/2003)
`#Dark` `(x+4)/2000+(x+3)/2001=(x+2)/2002+(x+1)/2003` `⇔((x+4)/2000+1)+((x+3)/2001+1)=((x+2)/2002+1)+((x+1)/2003+1)` `⇔(x+2004)/2000+(x+2004)/2001-(x+2004)/2002-(x+2004)/2003=0` `⇔(x+2004)(1/2000+1/2001+1/2002+1/2003)=0` Vì `(1/2000+1/2001+1/2002+1/2003) > 0` `⇔x+2004=0` `⇔x=-2004` Vậy `S={-2004}` Trả lời
`#Dark`
`(x+4)/2000+(x+3)/2001=(x+2)/2002+(x+1)/2003`
`⇔((x+4)/2000+1)+((x+3)/2001+1)=((x+2)/2002+1)+((x+1)/2003+1)`
`⇔(x+2004)/2000+(x+2004)/2001-(x+2004)/2002-(x+2004)/2003=0`
`⇔(x+2004)(1/2000+1/2001+1/2002+1/2003)=0`
Vì `(1/2000+1/2001+1/2002+1/2003) > 0`
`⇔x+2004=0`
`⇔x=-2004`
Vậy `S={-2004}`
Đáp án:
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