2x^2-5x-3=0x1=3,x2=-1/2所以M={3,-1/2}N真包含于M若m=0,则N=空集,满足条件m≠0,则N={1/m}1/m=3或1/m=-1/2m=1/3或m=-2综上:m∈{0,1/3,-2}
M={x|2x^2-5x-3=0}即M={-1/2,3},N真包含于M则N={-1/2}或N={3}或N为空集分别解出m=-2或1/3
m等于0或-2或1/3