题目

命题p：实数x满足 ，命题 ：实数x满足 （1） 若 ，且 为真，求实数 的取值范围； （2） 若 ，求实数 的取值范围． 答案：解：由于a＝1，则x2－4ax＋3a2<0⇔x2－4x＋3<0⇔1<x<3.所以p：1<x<3，解不等式组 {|x−1|≤2x+3x−2≥0 得2<x≤3，所以q：2<x≤3，由于p∧q为真，所以p，q均是真命题，解不等式组 {1<x<32<x≤3 得2<x<3，所以实数x的取值范围是(2,3) 解： ¬p ：x2－4ax＋3a2≥0，a>0，x2－4ax＋3a2≥0⇔(x－a)(2．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．每处错误仅涉及一个单词的增加、删除或修改．增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．删除：把多余的词用（\）划掉．修改：在错的词下划一横线，并在该词下面写出修改后的词．注意：1．每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分．Today is Mother's Day．I love Mother too much that I've done many things for her．In the morning I bought many flowers with pocket money and put it in the vase as soon as I returned to home．In the afternoon I went to the market to buy different kind of vegetables and cooked a simple and delicious dinner for my family．After supper，I gave Mother the card that I made by myself and said"Happy Mother's Day"to her．Then I tell her to pay more attention to her healthy and not to overwork．I also promised to help her do many housework from today on．Hearing the words，Mother moved to tears．Today is the special day，warm and meaningful．