![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The foci lie on the major axis, c units from the center, with ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7ffab851fa53088528c1d531524fbae9.png\")
.If the center is at the origin (0, 0), then the ellipse equations are :
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c8dad121d891bb9a1eae6bd3af3348d8.png\")
,
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=59612fb902bfd3ba34b54c16311a2ef6.png\")
.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
The ellipse equation is : ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=02527356f1060dd6dc45f3bd659c4db7.png\")
.
Rewrite the equation as : ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b35822218736b3e750ec9eb5552ac45d.png\")
.
Compare the above equation with .
a = 2 and b = 1.
\Option "(f)" is the correct choice.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
Option "(f)" is the correct choice.