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1996年第九届初中“祖冲之杯”数学邀请赛第5题颇富思考性,其解法思路灵活,涉及的知识面广.现举几种解法以供参考.
In 1996, the fifth issue of the 9th junior high school “Zu Chong Chongzhi” Math Invitational Tournament was quite speculative, and its solution method was flexible and involved a wide range of knowledge. Several solutions are now offered for reference.