A=｛2｝,则 2^2+2p+q=2,2p+q+2=0,q=-2(p+1)x^2+px+q=x,x^2+(p-1)x+q=0上述方和只有一个解,(p-1)^2-4q=0p^2-2p+1-4*((-2(p+1))=0p^2-2p+1+8p+8=0p^2+6p+9=0p=-3,q=-2(-3+1)=4所以 B={x|(x-1)^2-3(x-1)+4=x+1}(x-1)^2-...