设U=R,A={x|a≤x≤b},CuA={x|x＞4或x＜3},则a=___,b=___.

设U=R,A={x|a≤x≤b},CuA={x|x＞4或x＜3},则a=___,b=___.
设U=R,A={x|a≤x≤b},CuA={x|x＞4或x＜3},则a=___,b=___.

设U=R,A={x|a≤x≤b},CuA={x|x＞4或x＜3},则a=___,b=___.
∵U=R
CuA={x|x＞4或x＜3},
∴A=Cu(CuA)=｛x│3≤x≤4｝
={x|a≤x≤b},
∴a=3
b=4