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viniterranova

  • 4 years ago

Prove that a^2>0implies that a>0

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  1. ash2326
    • 4 years ago
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    No it's no true a^2>0 \[=> a>0 or a<0\]

  2. anonymous
    • 4 years ago
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    here 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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