A⁵ * (a⁵)² = a⁵ * a¹⁰ = a⁵⁺¹⁰ = a¹⁵
![\frac{ b^{3}* b^{7} }{ b^{2} }= \frac{ b^{3+7} }{ b^{2} }= \frac{ b^{10} }{ b^{2} }= b^{10-2} = b^{8}](https://tex.z-dn.net/?f=+%5Cfrac%7B+b%5E%7B3%7D%2A+b%5E%7B7%7D++%7D%7B+b%5E%7B2%7D+%7D%3D+%5Cfrac%7B+b%5E%7B3%2B7%7D+%7D%7B+b%5E%7B2%7D+%7D%3D+%5Cfrac%7B+b%5E%7B10%7D+%7D%7B+b%5E%7B2%7D+%7D%3D+b%5E%7B10-2%7D+%3D+b%5E%7B8%7D++++)
1,6а-6,4-0,6=1,2а-21. 1,6a-1,2=-21+6,4+0,6. 1,4a=14. a=10. Ответ :10
<em>
![y=-x^2+3x+2](https://tex.z-dn.net/?f=y%3D-x%5E2%2B3x%2B2)
</em>
<em>1) Вершина параболы имеет точки </em>
<em>
![x_0 = \frac{-3}{-2} = 1,5 \\ y_0 = -(1,5)^2+3 \cdot 1,5+2 =4,25](https://tex.z-dn.net/?f=x_0+%3D++%5Cfrac%7B-3%7D%7B-2%7D+%3D+1%2C5+%5C%5C+y_0+%3D+-%281%2C5%29%5E2%2B3+%5Ccdot+1%2C5%2B2+%3D4%2C25)
</em>
<em>2)
![D(f) = (-\infty;+\infty)](https://tex.z-dn.net/?f=D%28f%29+%3D+%28-%5Cinfty%3B%2B%5Cinfty%29)
</em>
<em>3)
![E(f) = (-\infty;4,25]](https://tex.z-dn.net/?f=E%28f%29+%3D+%28-%5Cinfty%3B4%2C25%5D)
</em>
<em>4) Наибольшее значение
![4,25](https://tex.z-dn.net/?f=4%2C25)
</em>
<em>5) Возрастает на промежутке
![(-\infty;1,5]](https://tex.z-dn.net/?f=%28-%5Cinfty%3B1%2C5%5D)
, а уменьшается
![[1,5;+\infty)](https://tex.z-dn.net/?f=%5B1%2C5%3B%2B%5Cinfty%29)
</em>
<em>6) Ветви смотрят вниз</em>
<em>7) Ограничена сверху</em>