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1. x1x=1

  • A. 1
  • B. 1
  • C. 1
  • D. 1

Answer: Option D

Explanation:

দেওয়া আছে, x-1/x=1

x^3-1/x^3

=(x-1/x)+3.x.1/x(x-1/x)

=(1)^3+3.1

=1+3

=4

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