优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> 计算:(1)3-2cos30°+0-(15)-1(2)求抛物线y=-12x2+3x-52的对称轴及顶点坐标.-数学
计算:(1)3-2cos30°+0-(15)-1(2)求抛物线y=-12x2+3x-52的对称轴及顶点坐标.-数学
题目简介
计算:(1)3-2cos30°+0-(15)-1(2)求抛物线y=-12x2+3x-52的对称轴及顶点坐标.-数学
题目详情
计算:(1)
3
-2cos30°+
0
-(
1
5
)
-1
(2)求抛物线y=-
1
2
x
2
+3x-
5
2
的对称轴及顶点坐标.
题型:解答题
难度:中档
来源:不详
答案
(1)原式=
3
-2×
3
2
+1-5,
=1-5,
=-4;
(2)∵y=-
class="stub"1
2
x2+3x-
class="stub"5
2
=-
class="stub"1
2
(x-3)2+2,
∴称轴及顶点坐标分别为x=3,(3,2)
上一篇 :
A survey of China's citizens
下一篇 :
— Harry is too thin for hi
搜索答案
更多内容推荐
---It is what parents say and do that really matters in children’s character training.--- _________.
(1)计算:(-1)2+sin230°+(2)0-(12)-1;(2)化简:3x-6x2-4÷x+2x2+4x+4.-数学
计算-3-64+2-3÷(-14)0+(0.125)2009×(-8)2008.-数学
(2014·南昌第二中学高三检测)We must keep our room clean,for dirt and disease go________,you know.A.hand in hand
Like some of my classmates,I cannot live up to my teachers' expectations;________,I let them do
After watching a movie Avatar, Mary lay in bed with her eyes ______ open while all her family were _
— Thanks for your help.— Don’t mention it. I _______ offered some advice.A.basicallyB.merelyC.eventu
计算:18-2sin45°+(π-3.14)0-数学
There I saw ten children ________ all, two of whom were from Class 3.-高三英语
December 17, 2011 was a sad day for the North Koreans, ______ their top leader Kim Jung-ill passed
The lake is _____ beautiful in spring and summer because of the pleasant weather in both seasons. A.
---It is what parents say and do that really matters in children’s character training.---________.A.
No one expected houses prices to fall, but _______ that is exactly what happened.A.moreover B.thus C
(2014·福建省普通高中质量检查)The doctor advised her to eat more bean products________meat which might be harmfu
计算:(1)18-32+22;(2)(13)-2-2sin45°+(π-3.14)0+128+(-1)3-数学
(1)计算:22-1-8-(2+1)0.(2)|-12|+sin30°+2cos245°-13tan260°.-数学
计算:sin60°+(13)-1-tan30°-(cos45°-2)0-数学
A friend of mine will go to France________Hong Kong,and we agree to contact each other________email.
Many chemical substances react________oxygen. A.onB.withC.againstD.to-高三英语
--- What do you think of the speech?--- The speaker said _____ nothing worth listening to.A.nearlyB.
若(x-2)0=1,则x的取值范围是[]A.x≥2B.x=0C.x≠2D.x=0或x=3-八年级数学
A friend of ______ went to the railway station to see ______.A.Rebecca;her off B.Rebecca; off her C
--What should I prepare for him?--________ anything. He is not particular with food.A.NearlyB.Almos
Luckily, only a few passengers aboard were ________ injured in the traffic accident.A.slightlyB.appr
Don't be too hard ______ the boy; he didn't mean it. [ ]A. at; doing B. on; to do C. for;
We can hardly believe what she says because she is ___changing her mind.A.regularlyB.eventuallyC.fir
求下列各式的值(1)9-24-327;(2)(2008)0+tan60°-2cos30°.-数学
计算:(1)(12)-1+|π-2009|0-3sin60°(2)解方程:1x-1=2x+1.-数学
(1)计算:22+(-3)0-9(2)化简:(a+b)2+a(a-2b)-数学
They are quite different ________ each other ________their tastes.A.from;inB.in; fromC.with; onD.wit
计算:(13)-1+16÷(-2)3+(2011-π3)0-3•tan60°.-数学
若(am+1bn+2)-(a2n-1b2m)=a5b6,求n-m的值.-数学
As he works in a remote area, he visits his parents only ____.A.occasionallyB.anxiouslyC.practicall
Compared with male graduates, a(n) ______ small number of female graduates can get employed when the
Luckily, the man escape death when a fire broke out in his home on Sunday morning.A.hardly B.gentlyC
Thirty computers have been sent to the school some other new teaching equipment.A.exceptB.includingC
People who are addicted ______ drugs can not go without them for a few hours.A.inB.forC.ofD.to-英语
(1)计算:12-(π-3)0+(12)-1-|-23|(2)解方程:(3x+2)2-4=0.-数学
计算:8-2(3-2)0+(23)-2=______-数学
Isn't ________ rude ________ him to talk to his mother like that?A.that; forB.that; ofC.it; for
—How do you react ________your father's suggestion?—I reacted strongly ________it.A.on;toB.on;w
(12)-3=______,(-2)0+(-2)2=______.-数学
如果(x-2)0有意义,那么x的取值范围是()A.x>2B.x<2C.x=2D.x≠2-数学
Compared with male graduates, a(n) ____ small number of female graduates can get employed when they
Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food pr
He never gave up his dream and ______ achieved his goal.A.personallyB.sincerelyC.eventuallyD.origina
There, a big memorial has been build _____ him, who devoted himself to the poor.A.in favor ofB.in me
–- Excuse me, would you mind answering a few questions?--- Well, I don’t know. I’m in a hurry ______
Inner beautity takes _____ a casual glance to appreciate and it is much more importnat than physical
She devoted herself _______ to her research and it earned her a good reputation in her field. A.stro
返回顶部
题目简介
计算:(1)3-2cos30°+0-(15)-1(2)求抛物线y=-12x2+3x-52的对称轴及顶点坐标.-数学
题目详情
(2)求抛物线y=-
答案
=1-5,
=-4;
(2)∵y=-
∴称轴及顶点坐标分别为x=3,(3,2)