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✨ Best Answer ✨

移行しただけです!!
4•3^x = 3^-x
3^x = 3^-x•1/4
3^x•3^x = 1/4
(3^x)^2 = 1/4

🍒

最後の1行抜けてました💦
(3^x)^2 = 1/4

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