1) sinx/2=0
x/2=Пk
x=2Пk
2)
2x-П/4=П/4+2Пk 2x-П/4=3П/4+2Пk
2x=П/2+2Пk 2x= П+2Пk
x=п/4+Пk x=П/2+пk
3)
sin(x/3+П/6)=1/2
x/3=2Пk x/3=2П/3+2Пk
x=6пk x=2П+2Пk
1)4^8*5^6/10^10=20^14/10^10=2^4=16
2)((4/5)^1/7)*(5^2/7)*(20^6/7)=((4^1/7)/(5^1/7))*(5^2/7)*(20^6/7)=сократить пять в степени= (4^1/7)*(5^1/7)*(20^6/7)= 20^1/7*20^6/7= 20^(1/7+6/7)=20^1= 20
5a²-4=a²-(4a-4a²)=5a²-4=a²-4a+4a²=5a²-4=5a²-4a=-4=-4a=-4a=-4
a=1