Решебник по математике 5 класс Ерина Виленкин рабочая тетрадь Часть 1, 2 Часть 2 | Страница 64

\[Стр.\ 64.\]

\[\boxed{\mathbf{5.}}\]

\[\textbf{а)}\ 3\frac{1}{3} < \frac{x}{3} < 5\]

\[\frac{10}{3} < \frac{x}{3} < \frac{15}{3}\]

\[x = 11;12;13;14.\]

\[\textbf{б)}\ 4\frac{1}{2} < \frac{x}{2} < 7\]

\[\frac{9}{2} < \frac{x}{2} < \frac{14}{2}\]

\[x = 10;11;12;13.\]

\[\boxed{\mathbf{6.}}\]

\[x^{3} - y = 0^{3} - 0 = 0\]

\[3x - y = 3 \cdot 0 - 0 = 0\]

\[x^{3} - y = 3x - y.\]

\[x^{3} - y = 1^{3} - 1 = 0\]

\[3x - y = 3 \cdot 1 - 1 = 2\]

\[x^{3} - y < 3x - y.\]

\[x^{3} - y = 2^{3} - 2 = 6\]

\[3x - y = 3 \cdot 2 - 2 = 4\]

\[x^{3} - y > 3x - y.\]

\[x^{3} - y = 4^{3} - 5 = 59\]

\[3x - y = 3 \cdot 4 - 5 = 7\]

\[x³ - y > 3x - y.\]