Răspuns:
9. varianta C: 0
10. varianta B: +8
11. 6
Explicație pas cu pas:
9.
[tex][(-2)^{2019} + (-2)^{2020} + (-2)^{2021} ]:3 + 2^{2019}[/tex]
[tex]= (-2^{2019} + 2^{2020} - 2^{2021} ):3 + 2^{2019}[/tex]
[tex]= 2^{2019} (-1 + 2 -4):3 + 2^{2019}[/tex]
[tex]= 2^{2019} * (-3) : 3 + 2^{2019}[/tex]
[tex]= -2^{2019} + 2^{2019}[/tex]
= 0
10.
x = (-2)³ + (-2)·(-5) = -8 + 10 = 2
y = 10² : (-5)² : (-2) = 100 : 25 : (-2) = 4 : (-2) = -2
I y-3x I = I -2 -3×2 I = I -2 - 6 I = I -8 I = 8
11.
103 - [41 - (17-5) + 68]
= 103 - (41 - 12 + 68)
= 103 - (29 + 68)
= 103 - 97
= 6
