设M=1996,则:
a=M^2+M^2·(M+1)^2+(M+1)^2
=M^2·(M+1)^2+(M+1)^2+M^2+1-1
=(M^2+1)[(M+1)^2+1]-1
=(M^2+1)[(M^2+1)+2M+1]-1
=(M^2+1)^2+2M(M^2+1)+(M^2+1)-1
=(M^2+1)^2+2M(M^2+1)+M^2
=(M^2+M+1)^2
∴a的算术平方根=M^2+M+1
=1996^2+1996+1
=1996×1997+1
=3986013
设M=1996,则:
a=M^2+M^2·(M+1)^2+(M+1)^2
=M^2·(M+1)^2+(M+1)^2+M^2+1-1
=(M^2+1)[(M+1)^2+1]-1
=(M^2+1)[(M^2+1)+2M+1]-1
=(M^2+1)^2+2M(M^2+1)+(M^2+1)-1
=(M^2+1)^2+2M(M^2+1)+M^2
=(M^2+M+1)^2
∴a的算术平方根=M^2+M+1
=1996^2+1996+1
=1996×1997+1
=3986013