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Please explain how to find it's locus My equation is coming 5x+5y-xy=25 but answer is y=5 So how to do the question?

Please explain how to find it's locus 
My equation is coming 5x+5y-xy=25 but answer is y=5
So how to do the question? 

Question Image
Grade:12

1 Answers

Abhishek Singh
104 Points
one month ago
Hey, you are almost there to the answer.
Your locus 25-5x-5y+xy=0 can be factoried as (5-x)(5-y) =0. 
Now see if B lies on x=5, ==> C can't lie on x=5[ why ? Because it would then not satisfy the slope condition]
Hence y=5 is the solution
 
 
 

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