UPSC NDA I 2014 Mathematics Paper
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For the next two (02) items that follow:
Consider the spheres
x 2 + y 2 + z 2 − 4 y + 3 = 0 x 2 + y 2 + z 2 + 2 x + 4 z − 4 = 0
Consider the spheres
[NDA I 2014]
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Question : 64 of 120
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What is the distance between the centres of the two spheres ?
[NDA I 2014]
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