Q. If x = a + 1a, y = a - 1a ,(a>0), then the value of x4+y4-2x2y2 is
A) 20
B) 16
C) 5
D) 10
✔ Correct Answer: 16
Exam Insight
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A) 20
B) 16
C) 5
D) 10
✔ Correct Answer: 16
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