Let a=x1+iy1z=x+iy NowRe(a+z)>Im(a+z) ∴x1+x>−y1+y x1=2,y1=10,x=−12,y=0 Given inequality is not valid for these values. S1 is false. Now Re(a+z)<Im(a+z) x1+x<−y1+y x1=−2,y1=−10,x=12,y=0 Given inequality is not valid for these values. S2 is false.