Picking some numbers might be the fastest approach.lenagmat wrote:Is integer R positive?
1). R^3=R
2). |R|=R
AO is E.
Let's jump right to . . .
Statements 1 and 2 combined:
If R^3=R and |R|=R then there are some contradicting cases:
case a: R=1, in which case R is positive
case b: R=0, in which case R is not positive
Since we cannot answer the target question with certainty, the statements combined are not sufficient, and the answer is E
Cheers,
Brent
