!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Ответ:
Объяснение:
1)
(1/3)²=1/9
OTBET: Г
2)
B^8 : b^4=b^(8-4)=b^4
OTBET: Б
3)
(3²*3^5*3^6) / 3^11 =3^(2+5+6)/3^11 = 3^13/3^11=3^(13-11)=3²
4)
(6a³b²)^4 *(8a^2b)^5 / 81*(2a^7b^4)³ = =(6^4a^12b^8*8^5a^10b^5)/(3^4*2^3a²1b^12=
=(2^4*3^4*a^22b^13(2³)^5 ) /2³*3^4a^21b^12= (2^19*3^4a^22b^13)/ 2³*3^4a^21b^12=
=2^16 ab
Y^2 + 12y + 32 = 0
D = b^2 - 4ac = 12^2 - 4*1*32 = 144 - 128 = 16;
y1 = ( - b + √D)/2a = ( - 12 + 4)/2 = - 8/2 = - 4;
<span>y1 = ( - b - √D)/2a = ( - 12 - 4)/2 = - 16/2 = - 8;
</span>
<u>Ответ:</u>
- 8; - 4
А) 2x=П/2+2Пn, n принадлежит Z
х=П/4+Пn, n принадлежит Z
<span>х=П/4+Пn, n принадлежит Z
б) </span>2cos3x = √3
cos3x = √3 / 2
3x = arccos(√3 / 2) + 2πk, k є Z
3x = ±π/6 + 2πk, k є Z
<span>x = ±π/18 + 2πk, k є Z</span>