(7) Use the counterexample method to prove that the following symbolized arguments are invalid 1 (x)Ax 2 (x)Bx 3 (x)(Ax Cx) (x)(Bx Cx)

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(7) Use the counterexample method to prove that the following symbolized arguments are invalid  1  (x)Ax 2  (x)Bx 3  (x)(Ax  Cx)   (x)(Bx  Cx)

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Question: (7) Use the counterexample method to prove that the following symbolized arguments are invalid. 1. (x)Ax 2. (x)Bx 3. (x)(Ax Cx) / (x)(Bx