1.

The resultant of two vectors P and Q. If the vector Q is reversed, then the resultant becomes S, then choose the correct option.

Answer»

<P>`R^(2)+S^(2)=2(P^(2)-Q^(2))`
`R^(2)+S^(2)=2(P^(2)+Q^(2))`
`R^(2)+S^(2)=(P^(2)-Q^(2))`
`R^(2)-S^(2)=2(P^(2)+Q^(2))`

SOLUTION :b


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