1/ x0+deltax=x1=4.01 f(x0)=1+2*4=9
f(x1)=1+2*4.01=1+8.02=9.02 delta f(x) =9.02-9=0.2
2/ f(x)=-5x+1.6 f(x0)=-5(-5)+1.6=25+1.6=26.6
x1=-5-0.1=-5.1 f(-5.1)=-0.55(-5.1)+1.6=27.1
delta f(x)=27.1-26.6=0.5
5x(a+b)-a-b=5x(a+b)-(a+b)=(a+b)(5x-1)
3m(x+y)-x-y=3m(x+y)-(x+y)=(3m-1)(x+y)
x(a-b)+a-b=x(a-b)+(a-b)=(x+1)(a-b)
4y(k-p)-k+p=4y(k-p)-(k-p)=(4y-1)(k-p)
<span>2a(x-y)-x+y=2a(x-y)-(x-y)=(2a-1)(x-y)</span>
Обозначим
6x=t
cost=-√3/2
t=±arccos(-√3/2)+2πk, k∈Z
arccos(-√3/2)=π-arccos(√3/2)=π -(π/6)=5π/6
t=± (5π/6)+2πk, k∈Z
Возвращаемся к переменной х:
6x=± (5π/6)+2πk, k∈Z
Делим на 6
х=± (5π/36)+(π/3)·k, k∈Z - о т в е т.