当x()时,4x-11=5;当x()时,4x-11>5;当x()时,4x-11<5.

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当x()时,4x-11=5;当x()时,4x-11>5;当x()时,4x-11<5.
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当x()时,4x-11=5;当x()时,4x-11>5;当x()时,4x-11<5.
当x()时,4x-11=5;当x()时,4x-11>5;当x()时,4x-11<5.

当x()时,4x-11=5;当x()时,4x-11>5;当x()时,4x-11<5.
当x(等于4)时,4x-11=5;当x(大于4)时,4x-11>5;当x(小于4)时,4x-11<5.