Multiple Choice Questions

If x 1 x 0 than x12 x14 x16 x18 ........

Quantitative Aptitude and Numerical Ability (DRDO) (Phase-i and II) Algebra

If x = 1/x = 0 than x¹² + x¹⁴ + x¹⁶ + x¹⁸ = ?

x + 1/x = 0
x² + 1 = 0
x² = – 1
x⁴ = 1
x¹² + x¹⁴ + x¹⁶ + x¹⁸
= (x⁴)³ + (x²)⁷ + (x⁴)⁴ + (x²)⁹
= 1 – 1 + 1 – 1
= 0

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