A*h+(b*h)/2=S
a=S/h - b/2
a=37/6 - 5/2=44/12=11/3=3 2/3
1/4 +0,07=1/4 +7/100= 25/100+7/100=32/100=0,32
X^3 - 9x^2 + 4x + 4 = x^3 - x^2 - 8x^2 + 8x - 4x + 4 = (x - 1)(x^2 - 8x - 4)
x^3 - 7x^2 + 2x + 4 = x^3 - x^2 - 6x^2 + 6x - 4x + 4 = (x - 1)(x^2 - 6x - 4)
Получаем
(x^2 - 8x - 4) / (x^2 - 6x - 4)
Xy =x+y +19999 ;
(x-1)(y -1) =19999 +1 ;
(x-1)(y -1) =20000 ;
(x-1)(y -1) =5⁴*2⁵ ;
* * * (4+1)(5+1) =5*6 =30 делителей * * *
ответ : 15 пар.
9x²-36x+7<0 D=1044
x₁=2+√29/3≈3.8 x₂=2-√29/3≈0,2.⇒
(x-3,8)(x-0,2)<0
-∞_______+______0,2_______-_______3,8_______+______+∞
x∈(0,2;3,8).