令x+y=u, xy=v, 左式移到右边后,可化简得(u+v-1)^2,即>=0
令x+y=u, xy=v, 左式移到右边后,可化简得(u+v-1)^2,即>=0
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy