动点M到两个定点A(0,-9/4)B(0,9/4)的距离的和是25/2,求动点M的轨迹.

Question

动点M到两个定点A(0,-9/4)B(0,9/4)的距离的和是25/2,求动点M的轨迹.

Answer 1

M(x,y)
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√(x-0)^2+(y+9/4)^2+√(x-0)^2+(y-9/4)^2=25/2
解一下就好了