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> (1)解下列不等式(组),并把解集在数轴上表示出来:①2x-2≤1+x;②;(2)计算:;(3)求x的值:4(x+1)2=81。-八年级数学
(1)解下列不等式(组),并把解集在数轴上表示出来:①2x-2≤1+x;②;(2)计算:;(3)求x的值:4(x+1)2=81。-八年级数学
题目简介
(1)解下列不等式(组),并把解集在数轴上表示出来:①2x-2≤1+x;②;(2)计算:;(3)求x的值:4(x+1)2=81。-八年级数学
题目详情
(1)解下列不等式(组),并把解集在数轴上表示出来:
①2x-2≤1+x;
②
;
(2)计算:
;
(3)求x的值:4(x+1)
2
=81。
题型:计算题
难度:中档
来源:江苏期中题
答案
解:(1)①解得x≤3,图“略”;
②解得
,图“略”;
(2)原式=4;
(3)
或
。
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题目简介
(1)解下列不等式(组),并把解集在数轴上表示出来:①2x-2≤1+x;②;(2)计算:;(3)求x的值:4(x+1)2=81。-八年级数学
题目详情
①2x-2≤1+x;
②
(2)计算:
(3)求x的值:4(x+1)2=81。
答案
②解得
(2)原式=4;
(3)