WBJEE 2021 Math Solved Paper
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CATEGORY - I (Q:1 to Q50)
Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.
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Question : 49 of 75
Marks:
+1,
-0
The differential equation of all the ellipses centred at the origin and have axes as the co-ordinate axes is
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