摘要：设 g(x)=.x＞0.有g′(x)== 0.得 x = 4．∵ 当x∈(0.4)时.g′(x)＜0,当x∈时.g′(x)＞0.

网址：http://m.1010jiajiao.com/timu_id_146486[举报]