\[\boxed{\text{833\ (833).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = 4 - x^{2};\ \ \ \ \ \ - 3 \leq x \leq 2\]
\[1)\]
\[x\] | \[- 3\] | \[- 2\] | \[- 1\] | \[0\] | \[1\] | \[2\] |
---|---|---|---|---|---|---|
\[y\] | \[- 5\] | \[0\] | \[3\] | \[4\] | \[3\] | \[0\] |
\[2)\]
\[3)\ y < 0\ \ при\ - 3 \leq x < - 2;\]
\[y > 0\ \ \ при\ \ \ - 2 < x < 2;\]
\[4)\ область\ значений\ :\]
\[- 5 \leq y \leq 4.\]
\[\boxed{\text{833.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[8a^{3} - b^{3} =\]
\[= (2a - b)\left( 4a^{2} + 2\text{ab} + b^{2} \right) =\]
\[= (2a - b)\left( 4a^{2} - 4\text{ab} + b^{2} + 6\text{ab} \right) =\]
\[= (2a - b)(2a - b)^{2} + 6ab =\]
\[= 1 \cdot 1² + 6ab = 1 + 6ab\]
\[6ab + 1 = 6ab + 1.\]