d. x + 4/ 5 - x - 5 lớn hơn bằng x + 3/3 - x - 2/2
Giải thích
d. x+45−x−5≥x+33−x−22
⇔6.x+4−30.x+530≥10.x+3−15.x−230⇔6x+24−30x−150≥10x+30−15x+30⇔−24x−126≥−5x+60⇔−19x≥186⇔x≤−18619
Vậy S=xx≤−18619
d. x+45−x−5≥x+33−x−22
⇔6.x+4−30.x+530≥10.x+3−15.x−230⇔6x+24−30x−150≥10x+30−15x+30⇔−24x−126≥−5x+60⇔−19x≥186⇔x≤−18619
Vậy S=xx≤−18619