Х³≤2х
х³-2х≤0
х(х²-2)≤0
х(х-√2)(х+√2)≤0
_-__-√2___+___0___-___√2____+_____
х∈(-∞;-√2]U[0;√2]
- 1 ≤ Cosx ≤ 1
- 1 + 5 ≤ Cosx + 5 ≤ 1 + 5
4 ≤ Cosx + 5 ≤ 6
Множество значений : [ 4 ; 6]
P(x)=-2x²+3x+4x²-3-8x+16=2x²-5x+13
(√3-3)/(3√2-√6)= (√3-3)/(3√2-√3√2)=(√3-3)/√2(3-√3)=-1/√2=-√2/2