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- #1

**$A$ is**

$(4,2)$ and $B$ is $(2,4)$

My Try:Let Coordinate of point $P$ be $(x,y)$. Then $PA = \sqrt{(x-4)^2+(y-2)^2}$ and $PB = \sqrt{(x-2)^2+(y-4)^2}$

$(4,2)$ and $B$ is $(2,4)$

My Try:

Now Let $f(x,y) = \sqrt{(x-4)^2+(y-2)^2}+\sqrt{(x-2)^2+(y-4)^2}$

Now How can i Minimize $f(x,y)$

Help me

Thanks