(3-10n0*2=3*2-10n*2=6-20n
cosx cos2x cos4x cos8x cos16x cos32x =
= (2sinxcosx / 2sinx) cos2x cos4x cos8x cos16x cos32x =
= (sin2x / 2sinx) cos2x cos4x cos8x cos16x cos32x =
= (sin2x / 2sinx) (2sin2xcos2x / 2sin2x) cos4x cos8x cos16x cos32x =
= (sin4x / 4sinx) (2sin4xcos4x / 2sin4x) cos8x cos16x cos32x =
= (sin8x / 8sinx) (2sin8xcos8x / 2sin8x) cos16x cos32x =
= (sin16x / 16sinx) (2sin16xcos16x / 2sin16x) cos32x =
= (sin32x / 32sinx) (2sin32xcos32x / 2sin32x) =
= sin64x / 64sinx
x = π/9
X²-xy-4x+4y=(x²-xy)-(4x-4y)=x(x-y)-4(x-y)=(x-y)(x-4)
ab-ac-bx+cx+c-b=(ab-ac)-(bx-cx)+(c-b)=a(b-c)-x(b-c)-(b-c)=(b-c)(a-x-1)
<span>-2ab³ * 3a² * b</span>⁴=-6a³b⁷
Посмотри, может я условие не так записала?