3) y=x/2
4) y=x^3
\[А\] | \[Б\] | \[В\] |
---|---|---|
\[3\] | \[4\] | \[2\] |
\[- 24; - 12; - 6;\ldots\]
\[b_{1} = - 24;\ \ b_{2} = - 12:\]
\[q = \frac{b_{2}}{b_{1}} = \frac{- 12}{- 24} = \frac{1}{2}.\]
\[S_{5} = \frac{b_{1} \cdot \left( 1 - q^{5} \right)}{1 - q} = \frac{- 24 \cdot \left( 1 - \left( \frac{1}{2} \right)^{5} \right)}{1 - \frac{1}{2}} =\]
\[= \frac{- 24 \cdot \left( 1 - \frac{1}{32} \right)}{\frac{1}{2}} = - 48 \cdot \frac{31}{32} =\]
\[= \frac{- 3 \cdot 31}{2} = - \frac{93}{2} = - 46,5.\]
\[Ответ:\ - 46,5.\]
\[\frac{4x^{2}}{2x - 1} + \frac{1}{1 - 2x} - 2x - 7 =\]
\[= \frac{4x^{2}}{2x - 1} - \frac{1}{2x - 1} - (2x + 7)^{\backslash 2x - 1} =\]
\[= \frac{4x^{2} - 1 - 4x^{2} - 14x + 2x + 7}{2x - 1} =\]
\[= \frac{- 12x + 6}{2x - 1} = \frac{- 6(2x - 1)}{2x - 1} = - 6.\]
\[Ответ:\ - 6.\]
\[\frac{3 - 2x}{x + 2} + 1^{\backslash x + 2} \leq 0\]
\[\frac{3 - 2x + x + 2}{x + 2} \leq 0\]
\[\frac{- x + 5}{x + 2} \leq 0;\ \ \ \ \ x \neq - 2\]
\[x < - 2;\ \ x \geq 5.\]
\[Ответ:4.\]
\[Ответ:3.\]
\[Ответ:третьего\ числа.\]
\[10\ 080\ рублей - 112\%\]
\[x\ рублей - 100\%\]
\[x = \frac{10\ 080 \cdot 100}{112} = 90 \cdot 100 =\]
\[= 9000\ (рублей) - стоит\ стиральная\]
\[машина.\]
\[Ответ:9000\ рублей.\]