hi everyone
please tell me this problem with solution teachers
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3rd will be the right answer
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thanks
np :D
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(x²-1/x²)³=x⁶+3 (x²)² 1/x²-3 x²(1/x²)²-1/x⁶
=x⁶-1/x⁶+3x²-3/x²
==x⁶-1/x⁶+3(x²-1/x²)
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