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If vector vec(A)=hat(i)+2hat(j)+4hat(k) ...

If vector `vec(A)=hat(i)+2hat(j)+4hat(k)` and `vec(B)=5hat(i)` represent the two sides of a triangle, then the third side of the triangle can have length equal to

A

`sqrt(56)`

B

`sqrt(21)`

C

5

D

6

Text Solution

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The correct Answer is:
A
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