已知关于X的方程X2(平方)+2(2-M)X+3-6M=0
题目
已知关于X的方程X2(平方)+2(2-M)X+3-6M=0
(1)求证:无论M取什么实数,方程总有实数根
(2)如果方程的两个实数根X1,X2,满足X1=3X2,求实数M的值
1.Bill's birthday is only in _.
A few day's time B few days' time
C a few day's time D a few days' time
2.A little boy was heard _ the Christmas songs at the party .
A sing B to sing C sang D sung
3.I don't know Mike _ him to help me .
A enough well to ask B well enough to ask
C enough well asking D well enough asking
改同意句
None of shoes are the right size for me .
All the shoes are _ too big _ too small for me .
He runs more slowly than those boys .
Nobody runs _ _ than he among all the boys.
造句
far + adj /adv(太,很)
far + 比较级(太,很)
答案
1.D
2.A
3.B
All the shoes are (either)too big (or)too small for me .
Nobody runs ( more slowly )than he among all the boys.
far + adj /adv(太,很)-These days I keep a far too busy life.
far + 比较级(太,很)_She is far better than me at writing
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
- 过点P(1,5)做直线交X轴于A,过Q(2,7)做直线PA的垂线,交Y轴于B点M在线段AB上且BM/MA=1/2,求M的轨迹
- 4x和7y中,x和y.(成比例吗,成的话是什么比例)
- mixture
- 如何证明“直角三角形中30度所对的直角边等于斜边的一半”的逆命题
- 同学们参加夏令营,一位同学负责去领碗,领了55个碗.一人一个饭碗,两人一个菜碗
- 语文中什么是疑问句
- 扫兴和大开眼界的意思.(劝人勤劳节俭.的成语三个)
- 一道困惑的数学题
- 若双曲线x平方4-y平方k=1的离心率e属于(1,2)求k的取值范围
- 两平面镜如图所示放置,有一点光源S在图示位置,从S发出的一条光线经两平面镜P,Q反射后,反射光线还能经过点
热门考点
- 七年级数学题 9-1=9,16-4=12,25-9=16,怎样写出规律式
- 10的x次方=3,10的y次方=2.求代数式10的3x+4y次方.
- Facinglife,we should smile.同义句转换
- 已知代数式ax的平方+bx+c,当x=-1时,它的值是0;当x=2时,它的值是3;当x=5时,值是60,求abc的值.
- 中有一种积极向上的人生态度的诗句是什么?
- “because .are.sweet.they“怎么连词成句
- 求 y= x^2 + 1/x的极值
- 函数图形变换
- 英语翻译
- they are all down in the dust where they rot one by one翻译