SSC IB Security Assistant & MTS Mock Test Series 2023 Quantitative Aptitude Algebra Linear Equation in 2 Variable

x, y और z वास्तविक संख्याएं हैं। यदि x3 + y3 + z3 = 13, x + y + z = 1 और xyz = 1 है तो xy + yz + zx का मान क्या है?

1
1
2
-1
3
3
4
-3
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