SOLUTION: i am supposed to show by counterexample that (x+y)^-2 and x^-2+y^-2 are not equivalent. i dont understand how to show this. please help

Question 276106: i am supposed to show by counterexample that (x+y)^-2 and x^-2+y^-2 are not equivalent. i dont understand how to show this. please help
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
i am supposed to show by counterexample that (x+y)^-2 and x^-2+y^-2 are not equivalent. i dont understand how to show this. please help
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Pick numbers for x and y see if it's true.
x = y = 1 is the easiest
(1+1)^-2 = 1/4
1^-2 + 1^-2 = 2
They're not equal, so it's disproven.

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