1.

|{:(a-b-c,2b,2c),(2a,b-c-a,2c),(2a,2b,c-a-b):}|=

Answer»

`(a+b+c)^(3)`
`2(a+b+c)^(3)`
`(a+b+c)^(2)`
`2(a+b+c)^(2)`

ANSWER :A


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