\[\boxed{\text{39.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
Пояснение.
Решение.
\[y\] | \[- 3\] | \[- 1\] | \[0\] | \[2\] | \[3\] | \[4\] | \[6\] |
---|---|---|---|---|---|---|---|
\[10 - 2y\] | \[16\] | \[12\] | \[10\] | \[6\] | \[4\] | \[2\] | \[- 2\] |
\[10 + 2y\] | \[4\] | \[8\] | \[10\] | \[14\] | \[16\] | \[18\] | \[22\] |
\[10\ - \ 2\ \cdot \ ( - 3) = \ 10\ + \ 6\ = \ \]
\[= 16\]
\[10\ - \ 2\ \cdot \ ( - 1) = \ 10\ + \ 2\ = \ \]
\[= 12\]
\[10\ - \ 2\ \cdot \ 0\ = \ 10\ - \ 0\ = \ 10\]
\[10\ - \ 2\ \cdot \ 2\ = \ 10\ - \ 4\ = \ 6\]
\[10\ - \ 2\ \cdot \ 3\ = \ 10\ - \ 6\ = \ 4\]
\[10\ - \ 2\ \cdot \ 4\ = \ 10\ - \ 8\ = \ 2\]
\[{10\ - \ 2\ \cdot \ 6\ = \ 10\ - \ 12\ = \ - 2 }{\ }{10\ + \ 2\ \cdot \ ( - 3) = \ 10\ - \ 6\ = \ 4}\]
\[10\ + \ 2\ \cdot \ ( - 1) = \ 10\ - \ 2\ = \ 8\]
\[10\ + \ 2\ \cdot \ 0\ = \ 10\ + \ 0\ = \ 10\]
\[10\ + \ 2 \cdot \ 2\ = \ 10\ + \ 4\ = \ 14\]
\[10\ + \ 2\ \cdot \ 3\ = \ 10\ + \ 6\ = \ 16\]
\[10\ + \ 2\ \cdot \ 4\ = \ 10\ + \ 8\ = \ 18\]
\[10\ + \ 2 \cdot \ 6\ = \ 10\ + \ 12\ = \ 22\]
\[\boxed{\text{39\ (39).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[\textbf{а)}\ 5y + 2\]
\[при\ всех\ значениях\ y;\]
\[\textbf{б)}\ \frac{18}{y}\]
\[при\ y \neq 0;\]
\[\textbf{в)}\ \frac{1}{x - 7}\]
\[при\ \ \ x - 7 \neq 0 \Longrightarrow x \neq 7;\]
\[\textbf{г)}\frac{m - 1}{4}\]
\[при\ всех\ значениях\ m;\]
\[\textbf{д)}\ \frac{7a}{3 + a}\]
\[при\ \ 3 + a \neq 0 \Longrightarrow a \neq - 3;\]
\[\textbf{е)}\ \frac{2b}{10 - b}\]
\[при\ \ 10 - b \neq 0 \Longrightarrow b \neq 10.\]