помогите решить пожалуйста​

N6

x + 2 > 0 ; x > -2

2 - x > 0 ; x < 2

x € (-2 ; 2)

N8

1/sin2x =/= 0

sin2x =/= 0

2x =/= πk

x =/= πk/2 ; k € Z

N9

tg3x

3x =/= π/2 + πk

x =/= π/6 + πk/3 ; k € Z

N10

ctg(x + π/4)

x + π/4 =/= πk

x =/= -π/4 + πk ; k € Z

N11

tgx + ctgx

x =/= π/2 + πk

x =/= πk => x =/= πk/2 ; k € Z

N12

3^sqrt(x)

x >= 0

N13

lg(1 - 2x)

1 - 2x > 0

2x < 1

x < 0,5

N14

1/lg(x^2 - x)

x^2 - x > 0

x^2 - x = 0

x = 1, x = 0

x^2 - x > 0

x € (-беск. ; 0) U (1 ; +беск.)

x^2 - x =/= 1

x^2 - x - 1 =/= 0

x^2 - x - 1 = 0

x = (1 +- sqrt(5))/2

x =/= (1 +- sqrt(5))/2

x € (-беск. ; (1 - sqrt(5))/2) U ((1 - sqrt(5))/2 ; 0) U (1 ; (1 + sqrt(5))/2) U ((1 + sqrt(5))/2 ; +беск.)