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
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
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