[" 4.If "(1)/(2)" and "b" are two vector...

[" 4.If "(1)/(2)" and "b" are two vectors then the value of "(vec a+vec b)times(vec a-vec b)" is : "],[[" (A) "2(b times a)," (B) "-2(vec b timesvec a)," (C) "vec b timesvec a]]

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