The foci F1 and F2, the vertices V1 and V2, and the endpoints U1 and U2 of the minor axis are as labeled in the figure. Graph the ellipse and find its standard equation. (The coordinates of V1, V2, U1, and U2 are integers, and the coordinates of F1 and F2 are given.)
A. 
+ 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
+ 
= 1
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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