Y ' = 12*2x + 4*3x^2 - 1 + 5*1 + 0 =
= 24x + 12x^2 + 4 =
= 12x^2 + 24x + 4 =
= 4* (3x^2 + 6x + 1)
A1 = - 6
a2 = 2
d = a2 - a1 = 2 + 6 = 8
a21 = a1 + 20d = - 6 + 20*8 = 154
Подставим вмести х корень х₁ = 1
1-5+5+А = 0
А = -1
х³ - 5х² + 5х - 1 = 0
(х³-1) - 5х(х-1) = 0
(х-1)(х²+х+1 - 5х) = 0
х²-4х+1 = 0
(х - (2 + √3))(х - (2-√3)) = 0
х₂ = 2+√3
х₃ = 2 - √3
4000×30:100=1200
4000+1200=5200 (теперь зарплата)
1) 5(a+d) - y * (a+b)
(a+b) *(5-y)
_________________
2. a
a-56+ __ - 5ab
2
3
__ a - 56 - 5ab
2
_____________________
3. 19
8a - ___b +3ab
2
______________________
4. a a
___ - ___ +6a +6
4 2
23
___a +6
4