43^(x/2)=a,2^y=b{a²-b²=17⇒(a+b)(a-b)=17⇒a-b=1{a+b=17{a-b=1{a+b=17прибавим2a=18a=9⇒3^(x/2)=9⇒x/2=2⇒x=4b=9-1b=8⇒2^y=8⇒y=3Ответ (4;3)5tg(π/3+2x)≠02x+π/3≠πk,k∈z2x≠-π/3+πk,k∈zx≠-π/6+πk/3,k∈z-π/2<2x+π/3<π/2-3π<12x+2π<3π-5π<12x<π-5π/12<x<π/12x∈(-5π/12+πk/3;-π/6+πk/3) U (-π/6+πk/3;π/12+πk/3)