已知实数x,y满足x^2=y^2=9(y大于等于0)试求m=(y+3)/(x+1)及b=2x+y的取值范围
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已知实数x,y满足x^2=y^2=9(y大于等于0)试求m=(y+3)/(x+1)及b=2x+y的取值范围
![已知实数x,y满足x^2=y^2=9(y大于等于0)试求m=(y+3)/(x+1)及b=2x+y的取值范围](/uploads/image/z/5249168-8-8.jpg?t=%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x%5E2%3Dy%5E2%3D9%EF%BC%88y%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E0%EF%BC%89%E8%AF%95%E6%B1%82m%3D%EF%BC%88y%2B3%EF%BC%89%2F%EF%BC%88x%2B1%EF%BC%89%E5%8F%8Ab%3D2x%2By%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4)
x^2=y^2=9应为x^2+y^2=9
答案是m≤-3/2或m≥1/2;-6≤b≤3sqrt(5)
sqrt(5):表示根号5
答案是m≤-3/2或m≥1/2;-6≤b≤3sqrt(5)
sqrt(5):表示根号5
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