早教吧作业答案频道 -->数学-->
Solvetheinequality(x-4)(3-x)>0findthesetofvaluesofxforwhich2x2+3x+2大于或等于4Rewrite3x2+9x+2asa(x+p)2次平方+qbycompletingthesquareandhence.sketchthecurvey=3x2+9x+2statingclearlytheco-ordinatesoftheturningpoin
题目详情
Solve the inequality (x-4)(3-x)>0
find the set of values of x for which 2x2+3x+2大于或等于4
Rewrite 3x2+9x+2 as a(x+p)2次平方+q by completing the square and hence.sketch the curve y=3x2+9x+2 stating clearly the co-ordinates of the turning point and y_ intercept.
没人看得懂吗?第一题就是 不等式 (x-4)(3-x)>0
第二题就找出值 2x2+3x+2大于或等于4
第三题就算了,只是不敢确定
答案我知道是 X>4或X<3
find the set of values of x for which 2x2+3x+2大于或等于4
Rewrite 3x2+9x+2 as a(x+p)2次平方+q by completing the square and hence.sketch the curve y=3x2+9x+2 stating clearly the co-ordinates of the turning point and y_ intercept.
没人看得懂吗?第一题就是 不等式 (x-4)(3-x)>0
第二题就找出值 2x2+3x+2大于或等于4
第三题就算了,只是不敢确定
答案我知道是 X>4或X<3
▼优质解答
答案和解析
记住口诀!小于取中间,大于取两边!第一题:(x-4)(3-x)>0.首先,使不等式左边未知数系数化为正数,即 (x-4)(x-3)<0.3<X<4
第二题:2x2+3x+2大于或等于4.即4+3X+2≥4.X≥-2/3
第二题:2x2+3x+2大于或等于4.即4+3X+2≥4.X≥-2/3
看了 Solvetheinequa...的网友还看了以下:
在matlab中 for i=1:2 T(i,:)=(t(i,:)for i=1:2 T(i,: 2020-05-13 …
对某式两边取积分是不是这么理解的(不懂装懂的同学请绕道啊别害人啊)比如对i(t)=Cdv(t)/d 2020-05-13 …
有个数学题想请教下大家设三阶矩阵A满足Aai=λai,其中i为下标(i=1,2,3),其中列向量a 2020-05-14 …
英语翻译1.Andy,who was a bad influence on me.2.when I 2020-05-17 …
用matlab求最大值i=(18-t^(2/3))-(5+t+2*t^(2/3))i是因变量,t是 2020-07-25 …
.已知u=220sin(628t+π/3)V,i=10sin(628t-π/3)A,则交流电的f= 2020-07-30 …
设有向量组a1=(1,1,0)T,a2=(2,3,0)T,a3=(3,1,1)T,a4=(1,-1, 2020-11-01 …
关于基础指针好心人,帮我看看这道题啊!谢谢了,怎么错了呢?#include<stdio.h>void 2020-11-04 …
根据下面的算法画出相应的流程图.算法:第一步:T←0;第二步:I←2;第三步:T←T+I;第四步:I 2020-12-05 …
英文单词分类填空动物类1.O()t()p()s2.k()t()e()3.l()b()t()r4.a( 2021-02-05 …