126２

对正数a, b, c，有：a^5-(b-5*c)*a^4-3*(6*b-c)*c*a^3-(5*b^3-25*b^2*c+5*b*c^2-2*c^3)*a^2+(6*b^4-13*b^3*c-6*b^2*c^2+19*b*c^3-16*c^4)*a+c^2*(b^3-6*b*c^2+8*c^3)>=0、a^5+2*(3*b-4*c)*a^4-(15*b^2+9*b*c-31*c^2)*a^3+3*(b^3+15*c*b^2-14*c^2*b-6*c^3)*a^2+(5*b^4-25*b^3*c-5*b^2*c^2+41*b*c^3-10*c^4)*a+(b-c)^2*(b^3-2*c*b^2+7*c^2*b+7*c^3)≥0．
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