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let a=n
[(27) ⅔-(81) ½]ⁿ=0
[(3³) ⅔-(3⁴) ½]ⁿ=0
[3³×⅔-3⁴×½]ⁿ=0
[3²-3²]ⁿ=0
n=1
[(27) ⅔-(81) ½]ⁿ=0
[(3³) ⅔-(3⁴) ½]ⁿ=0
[3³×⅔-3⁴×½]ⁿ=0
[3²-3²]ⁿ=0
n=1
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You are right nobody can answer
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