∵1.4^(3/2)＞0
(-2)^(1/3)＜0
∴(-2)^(1/3)＜0＜1.4^(3/2)
即(-2)^(1/3)＜1.4^(3/2)
[-1/2]^3=[-(2)^(-1)]^3=[-2]^(-1×3)=[-2]^(-3)=-1/8
[-2]^(1/3)=³√-2
所以不相等