1)y=3x-5/x-2=[3(x-2)+1]/(x-2)=3+1/(x-2)1/(x-2)≠0 3+1/(x-2)≠3值域为：y≠32)y=-2x²-3x-4=-2(x²+3/2x)-4=-2(x²+3/2x+9/16)+9/8-4=-2(x+3/4)²-23/8当x=-3/4时,函数取最大值-23/8,当x=1时,函...