r xx a= b xx a, r xx b= a xx b, a ne 0, ...

`r xx a= b xx a, r xx b= a xx b, a ne 0, b ne 0, a ne lamda b, a` is not perpendicular to b, then r =

A

`a-b`

B

`a+b`

C

`r.(a+b)`

D

`a xx b+b`

Text Solution

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The correct Answer is:

B

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