Tg(2x+π/3)=-√3/3;
2x+π/3=arctg(-√3/3)+πk, k∈Z;
2x+π/3=-arctg(√3/3)+πk, k∈Z;
2x+π/3=-π/6+πk, k∈Z;
2x=-π/3-π/6+πk, k∈Z;
2x=-π/2+πk, k∈Z;
x=-π/4+πk/2, k∈Z.
Ответ: -π/4+πk/2, k∈Z.
<span>|1 - 5х| = 3</span>
A/b =2 , тогда a=2b
((2b)² +b²) /2b×b =(4b²+b²) /2b² =5b²/2b² =5/2 =2.5