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Equation of the sphere described on the ...

Equation of the sphere described on the join of the points `bara=2bari+barj-bark and barb=bari-barj+bark` as diameter, is

A

`barr^(2)-3barr.bark=0`

B

`barr^(2)-3barr.barj=0`

C

`barr^(2)-3barr.bari =0`

D

`barr^(2)-barr.(bari+2barj-2bark)+3=0`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-APPENDICES (REVISION EXERCISE)-DOT PRODUCT OF TWO VECTORS
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  12. The centre and radius of the sphere (bar r-3bari-4barj+5bark)*(barr-2...

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  13. If 2bari and 4bark are the position vectors of the extremities of a di...

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  14. If the position vector of one end A of a diameter AB of the sphere |ba...

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  15. For a sphere, ends of a diameter have position vectors bara and -bara,...

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  17. If barx, bary, barz are three unnit vectors in three - dimensional spa...

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  19. A vector barn is inclined to x-axis at 45^(0), to y-axis at 60^(0) and...

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