If 
, then the value of 
is ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 ie 423.
We know, x + (1/x) = a, then [x³ + (1/x³) = a³ - 3a]
= k
multiplying by 4
= (12 × 144) / 4 = 423
SSC CGL 2019 PYQ — Question 5
SSC CGL Tier II Quant - 12/09/2019 • Quantitative Aptitude • Q5