UPSC NDA I 2018 Mathematics Solved Paper

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Question : 88 of 120

Marks: +1, -0

Which one of the following differential equations has a periodic solution?

[NDA I 2018]

d2x
dt2
+µx=0
d2x
dt2
−µx=0
x
dx
dt
+µt=0
dx
dt
+µxt=0

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