alleryFor vectors ā = î + ĵ and b̄ = î - ĵ, find |ā + b̄|:
A0
B√2
C1
D2
Answer & Solution
Correct answer: D. 2
We have ā + b̄ = (1+1)î + (1-1)ĵ.
So ā + b̄ = 2î.
**So |ā + b̄| = 2.**
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