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Prof. Moriarty wrote the following proof for the following claim: Claim: For any integers x, if x>1 then 3x+ 7 > 2x +11. Proof: Let
Prof. Moriarty wrote the following proof for the following claim: Claim: For any integers x, if x>1 then 3x+ 7 > 2x +11. Proof: Let x be an integer and x>1. We must show that 3x+7 > 2x +11 Simplifying: 3x+7 > 2x +11 i.e., 3x+10 > 2x +11 i.e. 3x-2x > 11-10 i.e., x>1 which we know to be true. QED Is the proof correct? If not, which of the below describes the part of the proof that is wrong Select one: O a. The proof as it stands is correct. O b. The proof will be correct if all the "i.e." are replaced by "implies" c. The statement that 3x+7 > 2x+11 implies 3x+10>2x+11 is wrong d. The proof has arithmetic errors. O e. The proof is wrong since the conclusion that is to be proved is assumed and things are derived from the conclusion
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