This is 20 1 1 the last fill-in-the-blank question in Mathematics Volume B of Chengdu Senior High School Entrance Examination. Many people's answers are wrong.
1) method:
(1) "when x
(2) Transforming the intersection problem into a set of equations, we can get:
③ Let p be (a, b). Available: ab=2k, a+ radical 3k=b, party a+party b =7, solution: k=3/7 (omitted).