解不等式2≤丨x²-3x+2丨<4
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解不等式2≤丨x²-3x+2丨<4
解不等式2≤丨x²-3x+2丨<4
解不等式2≤丨x²-3x+2丨<4
2≤丨x²-3x+2丨<4
2≤丨x²-3x+2丨且丨x²-3x+2丨<4
(x²-3x+2=2)且(-4
解不等式2≤丨x²-3x+2丨<4
当x²-3x+2>=0,
2≤x²-3x+2<4
解(x-1)(x-2)>=0,x>2或x<1,
0≤x²-3x<2,
0≤x²-3x,0≤x(x-3),x>3或x<0,
且x²-3x<2,x²-3x-2<0
当x²-3x+2<0,(x-1)(x-2)<0,1