Question

Решить неравенство : f(x) > 0 , если f(x) = 4x - (1/2)*x^2

Answer 1

f(x) = 4x - (1/2)*x²4x - (1/2)*x²>0(1/2)*x²-4x<0(1/2)*x²-4x=01/2x(x-8)=0
1/2x=0           x-8=0
x=0               x=8
x∈(0;8)