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[" QUESTION: "],[" If "vec a" and "vec b...

[" QUESTION: "],[" If "vec a" and "vec b" are two vectors,then the value of "],[(vec a+vec b)times(vec a-vec b)" is : "],[[" (1) "vec a timesvec b," (2) "vec b timesvec a],[" (3) "-2(vec b timesvec a)," (4) "2(vec b timesvec a)]],[" A.1"quad " В."2]

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