If \( P=\frac{3 x+1}{3 x-1} \) and \( Q=\frac{3 x-1}{3 x+1} \), then find \( P-Q \) and \( P+Q \...

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If \( P=\frac{3 x+1}{3 x-1} \) and \( Q=\frac{3 x-1}{3 x+1} \), then find \( P-Q \) and \( P+Q \).
Niqiat.
\( \therefore \)
\( \bar{E} \)
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