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If a=2i+2j-k, b=alphai+betaj+2k and |...

If `a=2i+2j-k, b=alphai+betaj+2k and `
`|a+b|=|a-b|`, then `alpha+beta` is equal to

A

2

B

1

C

0

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
B
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