冷眼旁觀

Alan

回覆: 2

2020-08-31 8:16 pm

急~請問如何化簡？ (2x²+1)³-3(x²-2)³-(2x²-1)(4x⁴+2x²+1)?

James

回覆: 9

2020-02-26 9:21 pm

If the second derivative of a function is 0 does that mean there is a point of inflection?

[匿名]

回覆: 3

2020-02-10 11:16 am

45~1000的整數中，7的倍數共有幾個?

[匿名]

回覆: 3

2019-12-31 12:41 pm

Relation between refractive index & critical angel??

[匿名]

回覆: 1

2019-11-10 11:58 pm

在standardization of sodium thiosulphate experiment,為什麼加入硫酸後要立刻滴定?

[匿名]

回覆: 1

2019-11-10 12:05 am

After 7 days, a particular radioactive substance decays to half of its original amount. Find the decay rate of this substance.?

[匿名]

回覆: 3

2019-11-09 11:21 pm

Unsure on how to work out this acid and base question?

kusmar

回覆: 2

2019-10-27 4:20 pm

Chemistry question please help?

[匿名]

回覆: 11

2019-07-12 6:36 pm

Without using long division or synthetic division show how x^2-4 is a factor of x^6-64.?

[匿名]

回覆: 2

2019-07-01 1:10 pm

Help with a few biology questions.?

[匿名]

回覆: 2

2019-03-29 8:53 pm

1.d軌道全滿、全空是不是没顏色，如果是可以解釋？ 2如果是，為什麼Mn2+是無色，他不是[Ar]3s2 3p6 3d5 ？是半滿，為什麼没顔色？

[匿名]

回覆: 2

2017-10-31 9:01 pm

Chemistry hw problem help!?

[匿名]

回覆: 4

2017-06-08 5:10 pm

Is anyone good at chemistry?

[匿名]

回覆: 1

2017-06-06 11:48 pm

a sample of nitrogen gas has a volume of 0.60 l at 0c. what is the volume of gas at 270 c a.0.48 b.1.19l c.2.55L d.2.88L?

[匿名]

回覆: 4

2017-02-25 2:57 pm

Integrate x^7/ x+1?

[匿名]

回覆: 2

2017-01-17 1:22 am

What is the work associated with decomposition of trinitrotoluene (TNT) upon detonation according to the following reaction at 307.95 K?

[匿名]

回覆: 2

2016-11-21 9:51 am

若等差級數31+27+23+......前n項的總和最大，則n之值為何?

[匿名]

回覆: 3

2016-07-25 8:02 am

WHAT IS THRICE OF 679?

[匿名]

回覆: 2

2016-07-05 8:19 am

The volume of methane, ch4 at STP required to completely consume 3.50L of oxygen at STP?

[匿名]

回覆: 5

2016-06-30 4:51 pm

How many solutions are there to the equation below? -46=3x+7x A. Infinitely many B. 1 C. 2?

[匿名]

回覆: 3

2016-02-19 3:02 pm

一條證明恆等式及一條利用代數方法求三角函數的極大極小值?

芮奇

回覆: 2

2016-02-15 11:33 am

數學問題 小梅讀一本書 第一天讀全書的7分之1 第二天讀全書的8分之3 兩天共讀了145頁 問這本書共有幾頁?

Kis

回覆: 2

2016-02-14 7:49 am

已知m、n為一元二次方程式x²-3x-1=0的解，則m³+10n+20=?

[匿名]

回覆: 2

2016-02-11 2:09 pm

下圖三角形ABC中的BD長多少公分？

[匿名]

回覆: 6

2016-02-09 6:11 am

請問如何解題？ 10乘12分之1+ 12乘14分之1+ 14乘16分之1+ 16乘18分之1=？

[匿名]

回覆: 1

2016-01-26 10:31 am

A sample of 3.80g of impure calcium carbonate was allowed to react with excess dilute hydrochloride acid .?

用戶44148

回覆: 3

2015-12-19 12:51 pm

已知一三角形每個外角的大小比例為3:4:5, 它是哪種三角形?

王稞稞

回覆: 2

2015-11-03 12:22 pm

有一直徑18公尺的圓形花圃,沿著花圃外圍鋪設一圈2公尺的的步道.現在將直徑改為6公尺,且步道面積不變,則步道寬度是幾公分?

[匿名]

回覆: 2

2015-09-02 9:19 pm

20已知一等差數列的項數為偶數 https://www.flickr.com/photos/101292575@N06/20906372618/in/dateposted-public/?

[匿名]

回覆: 3

2015-08-26 5:23 am

M2 Differentiation differentiate y=(x^2+1) (x^2-4)^(-1)?

mandy

回覆: 3

2015-08-07 5:41 am

Linear programming

[匿名]

回覆: 4

2015-08-04 4:20 pm

數學圓相切的意思

[匿名]

回覆: 4

2015-08-04 6:33 am

How to factorize b^2+6b-9-a^2

[匿名]

回覆: 2

2015-08-03 10:39 am

6水在自然界的循環中 地面

[匿名]

回覆: 5

2015-07-21 5:45 am

核廢料到底屬於粒子還是能量還是射線?或者?

Sissy

回覆: 2

2015-07-03 6:32 am

跪求ken大師解說詳細批算

[匿名]

回覆: 3

2015-06-28 1:39 am

急!! 有關大氣壓力的題目 求解---!

[匿名]

回覆: 4

2015-06-28 9:11 pm

教育局如何應對「王子」、「公主」欠缺教養？

[匿名]

回覆: 3

2015-06-23 5:18 am

人中&痣的矛盾

[匿名]

回覆: 3

2015-06-20 6:03 am

[物理]中學物理運動學

[匿名]

回覆: 4

2015-06-17 11:21 pm

一個數學問題:勝率

[匿名]

回覆: 7

2015-06-17 2:25 pm

理化熱氣球

[匿名]

回覆: 4

2015-06-02 6:05 am

這題答對智商180

[匿名]

回覆: 6

2015-06-01 11:07 pm

我的八字重量會有可能看得到鬼嗎

[匿名]

回覆: 4

2015-05-22 8:25 pm

放風水帆船船頭再放花瓶是什麼意思？

[匿名]

回覆: 4

2015-05-17 5:05 pm

量度電池內電阻實驗問題

trees

回覆: 3

2015-05-11 12:29 am

Maths 多項式的因式分解

Yi

回覆: 4

2015-05-12 6:49 am

國中數學(面積)

schooto

回覆: 5

2015-05-10 4:49 pm

八字的六神問題？沒有財官會怎樣？

[匿名]

回覆: 5

2015-05-04 6:32 am

國一下學期數學的問題