1. ()⁴=5²=25, 25⁴=625²=390625
2. sin(2x-π/4)<1/2
π- arcsin 1/2+2πn<2x-π/4 < arcsin 1/2 +2π+2πn n ∈Z
5π/6 +2πn<2x-π/4<π/6+2π+2πn
5π/12 +πn<x-π/8<π/12+π+πn
13π/24+πn<x<5π/24+π+πn
Объяснение:
)⁴=5²=25, 25⁴=625²=390625
