-(c-2*d)*(40*d^3-40*d^2+12*d-1)/(4*d*(40*d^3-42*d^2+12*d-1)) > 0(c-2*d)/(20*d^2-16*d+2) > 0-(20*c*d^2-16*c*d+c+2*d)/(4*d*(10*d^2-8*d+1)) > 0-((c - 2*d)*(10*d^2 - 7*d + 1))/(40*d^3 - 42*d^2 + 12*d - 1)>0-(40*c*d^2-32*c*d-20*d^2+5*c+14*d-2)/(80*d^3-84*d^2+24*d-2) > 01-(c-2*d)/(20*d^2-16*d+2)+(c-2*d)*(10*d^2-7*d+1)/(40*d^3-42*d^2+12*d-1) > 0(c-2*d)/(20*d^2-16*d+2)+d*(20*c*d^2-16*c*d+c+2*d)/(4*d*(10*d^2-8*d+1)) > 01-(c-2*d)/(20*d^2-16*d+2)+(c-2*d)*(10*d^2-7*d+1)/(40*d^3-42*d^2+12*d-1)+(c-2*d)*(40*d^3-40*d^2+12*d-1)/(4*d*(40*d^3-42*d^2+12*d-1)) > 0-((c - 2*d)*(10*d^2 - 7*d + 1))/(40*d^3 - 42*d^2 + 12*d - 1)-d*(-(5*c + 14*d - 32*c*d + 40*c*d^2 - 20*d^2 - 2)/(80*d^3 - 84*d^2 + 24*d - 2))>0
d>0
求c范围

九个不等式