railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Algebra

If x2 + x = -1, then find the value of x3 + x6 + \(\frac{1}{x^3}+\frac{1}{x^6}\).

1
4
2
1
3
-1
4
None of the above
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