Вве-че-рi, вдо-ма, взим-ку, вiд-кри-ти,вiд-гук, вдур-ге,вверх,вiд-даль,вiд-плив,вiд-ва-ре-ний
1)
![\frac{4}{11}+\frac{6}{11} = \frac{10}{11}](https://tex.z-dn.net/?f=+%5Cfrac%7B4%7D%7B11%7D%2B%5Cfrac%7B6%7D%7B11%7D+%3D+%5Cfrac%7B10%7D%7B11%7D+)
(4/11 + 6/11 = 10/11)
2)
![\frac{7}{25} + \frac{2}{25} = \frac{9}{25}](https://tex.z-dn.net/?f=+%5Cfrac%7B7%7D%7B25%7D+%2B++%5Cfrac%7B2%7D%7B25%7D+%3D+%5Cfrac%7B9%7D%7B25%7D+)
(7/25 + 2/25 = 9/25)
3)
![\frac{1}{9} + \frac{5}{9} = \frac{6}{9} = \frac{2}{3}](https://tex.z-dn.net/?f=+%5Cfrac%7B1%7D%7B9%7D+%2B+%5Cfrac%7B5%7D%7B9%7D+%3D+%5Cfrac%7B6%7D%7B9%7D+%3D+%5Cfrac%7B2%7D%7B3%7D+)
(1/9 + 5/9 = 6/9 = 2/3)
4)
![\frac{8}{100} + \frac{34}{100} = \frac{42}{100} = \frac{21}{50}](https://tex.z-dn.net/?f=+%5Cfrac%7B8%7D%7B100%7D+%2B+%5Cfrac%7B34%7D%7B100%7D+%3D+%5Cfrac%7B42%7D%7B100%7D+%3D+%5Cfrac%7B21%7D%7B50%7D+)
(8/100 + 34/100 = 42/100 = 21/50)
<span>5,96y+13+3,64y=86,5
</span>5,96у+3,65y=86,5-13
9,6y=73,5
y=7,65625
1
a)c{-3;6}⇒1/3c{-1;2}
b{2;-2}⇒-b{-2;2}
a=1/3c-b={-3;4}
б)/a/=√(9+16)=√25=5
в)a=-3i+4j
2
AB=
![\sqrt{(0+4)^2+(1-1)^2} = \sqrt{16+0} = \sqrt{16} =4](https://tex.z-dn.net/?f=+%5Csqrt%7B%280%2B4%29%5E2%2B%281-1%29%5E2%7D+%3D+%5Csqrt%7B16%2B0%7D+%3D+%5Csqrt%7B16%7D+%3D4)
BC=
![\sqrt{(-2-0)^2+(4-1)^2} = \sqrt{4+9} = \sqrt{13}](https://tex.z-dn.net/?f=+%5Csqrt%7B%28-2-0%29%5E2%2B%284-1%29%5E2%7D+%3D+%5Csqrt%7B4%2B9%7D+%3D+%5Csqrt%7B13%7D+)
CD=
![\sqrt{(-6+2)^2+(4-4)^2} = \sqrt{16+0} = \sqrt{16} =4](https://tex.z-dn.net/?f=+%5Csqrt%7B%28-6%2B2%29%5E2%2B%284-4%29%5E2%7D+%3D+%5Csqrt%7B16%2B0%7D+%3D+%5Csqrt%7B16%7D+%3D4)
AD=
![\sqrt{(-6+4)^2+((4-1)^2}= \sqrt{4+9} = \sqrt{13}](https://tex.z-dn.net/?f=+%5Csqrt%7B%28-6%2B4%29%5E2%2B%28%284-1%29%5E2%7D%3D+%5Csqrt%7B4%2B9%7D+%3D+%5Csqrt%7B13%7D++)
AB=CD U BC=AD⇒ABCD-параллелограмм
P=2(AB+BC)=2(4+√13)=8+2√13
3
AB{2-m;6} ,BC{-3;6}
AB=BC⇒2-m=-3⇒m=2+3=5