Let f(x,y)=√x2+y2+√x2+y2−2x+1+√x2+y2−2y+1+√x2+y2−6x−8y – InterviewSolution

1.	Let f(x,y)=√x2+y2+√x2+y2−2x+1+√x2+y2−2y+1+√x2+y2−6x−8y+25∀x,yϵR, then
Answer» Let $f (x, y) = \sqrt{x^{2} + y^{2}} + \sqrt{x^{2} + y^{2} - 2 x + 1} + \sqrt{x^{2} + y^{2} - 2 y + 1} + \sqrt{x^{2} + y^{2} - 6 x - 8 y + 25} \forall x, y ϵ R, t h e n$

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