r2
\(\frac{1}{r^4}\)
-\(\frac{1}{r^2}\)
1 - r
Correct answer is C
\(x^2 + \frac{2x}{r^2}\) + \(\frac{1}{r^4}\) = 0 (x + \(\frac{1}{r^2}\)) = 0 x + \(\frac{1}{r^2}\) = 0 x = \(\frac{-1}{r^2}\)
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