设实数a,b,c不等于0,bc/a,ca/b,ab/c成等差数列,则下列不等式一定成立的是A |b|<=|ac| B b^2>=|ac| C a^2<=b^2<=c^2 D |b|<=(|a|+|c|)/2

问题描述:

设实数a,b,c不等于0,bc/a,ca/b,ab/c成等差数列,则下列不等式一定成立的是
A |b|<=|ac| B b^2>=|ac| C a^2<=b^2<=c^2 D |b|<=(|a|+|c|)/2