第9章 9.5

(1)

(4)0=1(-4)^0 = 1

(2)

(2)3=1(2)3=18(-2)^{-3} = \frac{1}{(-2)^3} = -\frac{1}{8}

(3)

32325250=1251=124\frac{3^2 \cdot 3^{-2}}{5^2 - 5^0} = \frac{1}{25 - 1} = \frac{1}{24}

(4)

(2+21)1=(2+12)1=(52)1=25(2 + 2^{-1})^{-1} = \left(2 + \frac{1}{2}\right)^{-1} = \left(\frac{5}{2}\right)^{-1} = \frac{2}{5}

(5)

(3+31)2=(3+13)2=(103)2=9100(3 + 3^{-1})^{-2} = \left(3 + \frac{1}{3}\right)^{-2} = \left(\frac{10}{3}\right)^{-2} = \frac{9}{100}

解説: r31bn1z