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x﹣2y+7=0 2x+y﹣1=0 x﹣2y﹣5=0 2x+y﹣5=0
2x+y﹣5=0 2x+y﹣1=0 x﹣2y+7=0 x﹣2y﹣5=0
y"-y'-2y=3xex y"-y'-2y=3ex y"+y'-2y=3xex y"+y'-2y=3ex
x﹣3<y﹣3 x+5>y+5 < ﹣2x>﹣2y
[ 2 ,5] [ 2 ,9] [ 5 ,9] [ - 1 ,9]
y"-y’-2y=3xex y"-y’-2y=3ex y"+y’-2y=3xex y"+y’-2y=3ex
(-1,3) (-1,-3) (1,3) (1,-3)
={x||x-1|<2}, ={y|y=2x,x∈[0,2]},则A.∩B.= ( ) A.[0,2]B.(1,3) [1,3) (1,4)
x=1,y=1 x=,y=- x=,y=- x=-,y=
由x+3=6,得x=6+3 由2x=x+1,得x﹣2x=1
由﹣2y=12﹣y,得y﹣2y=12 由x+5=1﹣2x,得x﹣2x=1+5
={x|x2-2x-3<0}, ={y|y=2x,x∈[0,2]},则A.∩B=( ) A.[0,2]B.(1,3) [1,3) (1,4)
(1,-3) (3,-1) (-3,1) (-1,3)