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ash2326
 2 years ago
Best ResponseYou've already chosen the best response.0No it's no true a^2>0 \[=> a>0 or a<0\]

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.2here is my proof \[(2)^2=4>0\] but \[2<0\] so we have a counter example therefore it is not true that \[a^2>0\implies a>0\]
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