Suppose that . Find the least distance from the point [tex](a,0) to the ellipse .
Well basically i used the distance formula, so .
Then i set up a function .
I differentiated it it find .
I then found to be the minimum turning point and subbed it back into distance formula to get .
However the answer is:
i get why its |a-2| if a>2 but i dont get why its |a-2| between a=3/2 and a=2.
Can someone please explain why?