Question

7x^3-24x^2+24x-8<0 при X>=1

Answer 1

7x²(x-2)-10x(x-2)+4(x-2)<0
(x-2)(7x²-10x+4)<0
7x²-10x+4>0 при любом х,т.к.D<0
x-2<0
x<2
x∈[1;2)