examday

/TMUA

Consider the following claim:

For all real numbers $a$ and $b$, if $a^2>b^2$ then $a>b$.

Which of the following is/are a counterexample to the claim?

• I $a=3$, $b=-4$
• II $a=-3$, $b=2$
• III $a=-5$, $b=-2$