Which of the following statements are TRUE: (1) A system of 3 linear equations in 3 variables always has a unique solution. (2) There is no system of linear equations which has exactly 3 solutions. (3) A system of 3 linear equations in 4 variables never has a unique solution. O (1) and (3) None of the others are correct (3) only O (1) only O (2) only (2) and (3)

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