Toán Lớp 6: Tìm x
x+2017/1.2+x+2017/2.3+…+x+2017/99.100=0
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Toán Lớp 6: Tìm x
x+2017/1.2+x+2017/2.3+…+x+2017/99.100=0
Comments ( 2 )
(x+2017)(1/1.2+1/2.3+…+1/99.100)=0
(x+2017)(1-1/2+1/2-1/3+…+1/99-1/100)=0
(x+2017)(1-1/100)=0
(x+2017)(100/100-1/100)=0
(x+2017). 99/100=0
x+2017=0:99
x+2017=0
x=0-2017
x=-2017
Vậy x=-2017