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1/p>r/r^2+2
Thus if p>o, r^2+2>pr Case 1
If P<0, r^2+2<pr>r^2. Case 1.
Case2 does not hold true as r^2+2 can not be less than -r^2.
Thus 1 is sufficient.

Maybe I am very tired and talking completely nonsense. But please explain.

I didn't do any algebraic manipulation on this one. I just plugged in the number 3, then the number -3, for p and r, to check the first statement. With 3 it was true:
1/p>r/r^2+2 becomes 1/3>3/11, true

With -3 it was false:
1/p>r/r^2+2 becomes -1/3>-3/11, false
so insufficient.

Statement 2 gives no info about the value of p, so insufficient.

With both of them, we know that p and r are equal and positive. Any positive value makes the statement true.

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