Упр.18.23 ГДЗ Мордкович 7 класс (Алгебра)

б) (-3*1/3)3;
в) (-1*2/3)4;
г) (5*1/4)2.

1. $$\left(2\frac{1}{5}\right)^2=\left(\frac{11}{5}\right)^2=\frac{121}{25}=4\frac{21}{25}$$
2. $$\left(-3\frac{1}{3}\right)^3=\left(-\frac{10}{3}\right)^3=-\frac{1000}{27}=-37\frac{1}{27}$$
3. $$\left(-1\frac{2}{3}\right)^4=\left(-\frac{5}{3}\right)^4=\frac{625}{81}=7\frac{58}{81}$$
4. $$\left(5\frac{1}{4}\right)^2=\left(\frac{21}{4}\right)^2=\frac{441}{16}=27\frac{9}{16}$$

Ответ

а) $$4\frac{21}{25}$$; б) $$-37\frac{1}{27}$$; в) $$7\frac{58}{81}$$; г) $$27\frac{9}{16}$$.