∠ABC∠O1B1N45°∵OC3OAOB∴NF3O1FB1F∴O1F
2
1339O1B1NF3×444499272得x2x3解得x442
∵N在抛物线yx2x3上∴令y
∵将△OBC向右平移∴x
2727＜0不合题意舍去∴x22
∴N
279273127∴m44224
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