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Which conditional and its converse form a true biconditional? A) If x>0, then lxl >0 B) If x=3, then x2^2=9 C) If x^2 =4, Then x=2 D) If x=19, then 2x-3=35

Daniel King

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Donald Ward on February 11, 2018

The answer is (D) If x=19, then 2x-3=35 proofIf x=19, 2(19)-3=38-3=35 so If x=19, then 2x-3=35 is verifiedif 2x-3=35 therefore 2x=35 + 3, 2x=38 implies x = 19, so x =19 is verified If x=19 if and only if 2x-3=35


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