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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Three Dimensional Geometry

NDA 2013 · Mathematics · Three Dimensional Geometry

What should be the value of k for which the equation 3 x^2+3...

What should be the value of kk for which the equation 3x2+3y2+(k+1)z2+x−y+z=03 x^2+3 y^2+(k+1) z^2+x-y+z=0 represents the sphere?

Options

  1. A33
  2. B22
  3. C11
  4. D−1-1

Correct answer

B. 22

Step-by-step solution

k+1=3⇒k=2k+1=3 \quad \Rightarrow \quad k=2
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