1)
![6* \frac{2}{11} *5* \frac{1}{8} +1* \frac{9}{11} * 5* \frac{1}{8} = \frac{12}{11} * \frac{5}{8} + \frac{9}{11} * \frac{5}{8} = \frac{5}{8} ( \frac{12}{11} + \frac{9}{11} )= \frac{5}{8} *\frac{21}{11}=](https://tex.z-dn.net/?f=6%2A++%5Cfrac%7B2%7D%7B11%7D+%2A5%2A+%5Cfrac%7B1%7D%7B8%7D+%2B1%2A+%5Cfrac%7B9%7D%7B11%7D+%2A+5%2A+%5Cfrac%7B1%7D%7B8%7D+%3D++%5Cfrac%7B12%7D%7B11%7D+%2A+%5Cfrac%7B5%7D%7B8%7D+%2B+%5Cfrac%7B9%7D%7B11%7D+%2A++%5Cfrac%7B5%7D%7B8%7D+%3D+%5Cfrac%7B5%7D%7B8%7D+%28+%5Cfrac%7B12%7D%7B11%7D+%2B+%5Cfrac%7B9%7D%7B11%7D+%29%3D+%5Cfrac%7B5%7D%7B8%7D+%2A%5Cfrac%7B21%7D%7B11%7D%3D+)
![= \frac{105}{88} =1 \frac{17}{88}](https://tex.z-dn.net/?f=%3D+%5Cfrac%7B105%7D%7B88%7D+%3D1+%5Cfrac%7B17%7D%7B88%7D+)
или условие должно было быть таким:
![6 \frac{2}{11} *5 \frac{1}{8} +1 \frac{9}{11} *5 \frac{1}{8}= 5 \frac{1}{8}(6 \frac{2}{11} +1 \frac{9}{11})=5 \frac{1}{8} *8= \frac{41}{8} *8=41](https://tex.z-dn.net/?f=6+%5Cfrac%7B2%7D%7B11%7D+%2A5+%5Cfrac%7B1%7D%7B8%7D+%2B1+%5Cfrac%7B9%7D%7B11%7D+%2A5+%5Cfrac%7B1%7D%7B8%7D%3D+5+%5Cfrac%7B1%7D%7B8%7D%286+%5Cfrac%7B2%7D%7B11%7D+%2B1+%5Cfrac%7B9%7D%7B11%7D%29%3D5+%5Cfrac%7B1%7D%7B8%7D+%2A8%3D+%5Cfrac%7B41%7D%7B8%7D+%2A8%3D41)
2)
![6,71*2,8-4,71*2,8=2,8(6,71-4,71)=2,8*2=5,6](https://tex.z-dn.net/?f=6%2C71%2A2%2C8-4%2C71%2A2%2C8%3D2%2C8%286%2C71-4%2C71%29%3D2%2C8%2A2%3D5%2C6)
9^{-9-х}=729
9^{-9-х}= 9^{3}
-9-х=3
-х=-12
х=12
1) При x < -1 будет |x+1| = -x-1, |x-2| = 2-x
y = 2-x - (-x-1) + x-2 = 2-x+x+1+x-2 = x+1
2) При -1 < x < 2 будет |x+1| = x+1, |x-2| = 2-x
y = 2-x - (x+1) + x-2 = -x-1
1) и 2) прямые пересекаются в точке
x + 1 = -x - 1
2x = -2
x = -1, y = 0
3) При x > 2 будет |x+1| = x+1, |x-2| = x-2
y = x-2 - (x+1) + x-2 = x-2-x-1+x-2 = x - 5
2) и 3) прямые пересекаются в точке
-x - 1 = x - 5
2x = 4
x = 2, y = -3
Так вот, по 2 пересечения будет при m = 0 и при m = -3
<span>При m < -3 и m > 0 будет по одному пересечению. При -3 < m < 0 будет 3 пересечения</span>