1
1/x³-1/x²≤0
(1-x)/x³≤0
x=1 x=0
_ + _
----------------(0)-------------[1]------------------
x∈(-∞;0) U [1;∞)
2
7-16/(x+1)-x≥0
(7x+7-16-x²-x)/(x+1)≥0
(-x²+6x-9)/(x+1)≥0
(x²-6x+9)/(x+1)≤0
(x-3)²/(x+1)≤0
x=3 x=-1
_ + +
----------------(-1)------------[3]-------------------
x∈(-∞;-1) U {3}