Under what condition does the equation `x^2 + y^2 + z^2 + 2ux + 21 vy + 2wz + d = 0` represent a real sphere'?

Ask a Question


Question Asked by a Student from EXXAMM.com Team


Q 2389278117.     Under what condition does the equation
`x^2 + y^2 + z^2 + 2ux + 21 vy + 2wz + d = 0` represent
a real sphere'?
NDA 2009 Paper 1
A

`u^2 + v^2 + w^2 = d^2`

B

`u^2 + v^2 + w^2 > d`

C

`u^2 + v^2 + w^2 < d`

D

`u^2 + v^2 + w^2 < d^2`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

Find instant solution to any question from our database of 1.5 Lakh + Questions

 


Access free resources including

  • 100% free video lectures with detailed notes and examples
  • Previous Year Papers
  • Mock Tests
  • Practices question categorized in topics and 4 levels with detailed solutions
  • Syllabus & Pattern Analysis

Engineering


Medical


Banking


DEFENCE


SSC


RRB


CBSE-NCERT


OLYMPIAD