X²-(4-2x)² = 5х² - ( 16 -16х +4х²) = 5
х² - 16 + 16х - 4х² = 5
-3х² + 16х - 21 = 0
3х² - 16х + 21 = 0
D = ( -16)² - 4·3·21= 256 - 252 = 4
x₁ = (16 - 2)/6=7/3 или х ₂= (16 + 2)/6=9/3
1/8<2^(x-1)≤16
2^(-3)<2^(x-1)≤2⁴
-3<x-1≤4
-2<x≤5
<span>f(x) = x^3.
</span>
<span><span> f(1) - f(0) = 1^3 - 0^3 =1
f(2) - f(1) = 2^3 - 1^3 = 8 - 1 = 7
f(3) - f(2)</span> = 3^3 - 2^3 = 27 - 8 = 19
1 < 7</span> < 19
<span> f(1) - f(0) < f(2) - f(1) < f(3) - f(2)</span>