已知集合M={1,2,3},N={1,2,3,4},定义函数f:M→N且点A(1,f(1)),B(2,f(2))下面图片有题完全没看懂,证明等腰看懂了,直角哪个为什么不行?λ为0时不行吗?下面的看不懂了,由BA=BC得到f(1)=f(3
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![已知集合M={1,2,3},N={1,2,3,4},定义函数f:M→N且点A(1,f(1)),B(2,f(2))下面图片有题完全没看懂,证明等腰看懂了,直角哪个为什么不行?λ为0时不行吗?下面的看不懂了,由BA=BC得到f(1)=f(3](/uploads/image/z/12112676-44-6.jpg?t=%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88M%3D%7B1%2C2%2C3%7D%2CN%3D%7B1%2C2%2C3%2C4%7D%2C%E5%AE%9A%E4%B9%89%E5%87%BD%E6%95%B0f%EF%BC%9AM%E2%86%92N%E4%B8%94%E7%82%B9A%EF%BC%881%2Cf%EF%BC%881%EF%BC%89%EF%BC%89%2CB%EF%BC%882%2Cf%EF%BC%882%EF%BC%89%EF%BC%89%E4%B8%8B%E9%9D%A2%E5%9B%BE%E7%89%87%E6%9C%89%E9%A2%98%E5%AE%8C%E5%85%A8%E6%B2%A1%E7%9C%8B%E6%87%82%2C%E8%AF%81%E6%98%8E%E7%AD%89%E8%85%B0%E7%9C%8B%E6%87%82%E4%BA%86%2C%E7%9B%B4%E8%A7%92%E5%93%AA%E4%B8%AA%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E8%A1%8C%3F%CE%BB%E4%B8%BA0%E6%97%B6%E4%B8%8D%E8%A1%8C%E5%90%97%3F%E4%B8%8B%E9%9D%A2%E7%9A%84%E7%9C%8B%E4%B8%8D%E6%87%82%E4%BA%86%2C%E7%94%B1BA%3DBC%E5%BE%97%E5%88%B0f%EF%BC%881%EF%BC%89%3Df%EF%BC%883)
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