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Q.

 If a=i^+6j^+3k^;b=3i^+2j^+k^ and c=(α+1)i^+(β1)j^+k^ are linearly dependent  vectors and |c|=6; then the possible 

value (s) of (α+β) can be: 

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a

1

b

2

c

3

d

4

answer is A.

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Detailed Solution

 Take a¯    b¯    c¯=0 β=3 c=(α+1)i^+2j^+k^ |c|=6 (α+1)2+4+1=6 α=0,2 α+β=3,1

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