Increasing and decreasing functions - help

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GogetaORvegito?
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I've been bamboozled by part a which I highlighted in yellow as I don't know what that means. And I just have no clue how to do part b..
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Interea
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The highlighted part is just saying you've tried it for -1 and got one inequality, and then tried it for 1 and got another one, but since you know both have to be true (i.e. p is bigger than both 2 and -2), overall we just want p>=2.
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GogetaORvegito?
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(Original post by Interea)
The highlighted part is just saying you've tried it for -1 and got one inequality, and then tried it for 1 and got another one, but since you know both have to be true (i.e. p is bigger than both 2 and -2), overall we just want p>=2.
Oh I didn't realize both have to be true. Guess I should have inferred that from the "one possible value". Thanks
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