個人的理解,由 f(f(1))=1,隻能得出 f(1) 可能為1 或 0. 還是要排除 f(1)= 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