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(-1/4)^2009*4^2010 =[-1/4]*4]^2009*4 =[-1]^2009*4 =-1*4 =-4
3の18乗はマイナス9分の1の8乗を掛けます。 =3の18乗×(3分の1)の16乗 =3²×3の16乗×(3分の1)の16乗 =9×(3)×3分の1)の16乗 =9×1 =9
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