railway DFCCIL Executive 2025 Mock Test Quantitative Aptitude Algebra Identities

If p + q + r = 0, the value of \(\frac{{{{\rm{p}}^{\rm{2}}}}}{{{\rm{qr}}}}\,{\rm{ + }}\,\frac{{{{\rm{q}}^{\rm{2}}}}}{{{\rm{rp}}}}{\rm{ + }}\frac{{{{\rm{r}}^{\rm{2}}}}}{{{\rm{pq}}}}\) = ?

1
3 pqr
2
1
3
3
4
2
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