Re: [計量] Given two concentric circles, ...
※ 引述《IamSierra (面對轉變能做什麼?)》之銘言:
: ※ 引述《sunrise5566 (想法很邪惡 行為很糟糕)》之銘言:
: : Given two concentric circles, such that
: : a tangent to the smaller circle cuts the
: : larger one at two points 'R' and 'S'.
: : If the radius of smaller circle is 2 and
: : larger circle is 5, then what is the length of segment 'RS'?
: : ANS:2 sqrt(5)
: (請自行畫圖)
: 連接圓心和S, R和切線形成一個等腰三角形
: 兩邊是5, 底邊上的高是小圓的半徑2
: 畢氏定理: 2*sqrt[(5^2 - 2^2)] = 2 sqrt(21)
: : If the remainder when 10^32 is divided by 11 is 'R', then
: : Col A: R+2
: : Col B: 3
: : ANS:B (我算是c = =)
: (11-1)^32 = 11n +1 , n是正整數
: 我也算相等
: : If R = Set of prime numbers from 1 to 50,
: : S = Set of multiples of 15 from 10 to 50,
: : T = Set of odd numbers from 1 to 50, then
: : how numbers will be common in all the three sets?
: : ANS: 0
: S set沒有質數,R都是質數
: 答案0
: : Given numbers 1, 2, 3, 4 & 5.
: : What is the probabilty of choosing two odd numbers
: : at random from the given numbers such that
: : the sum of the two numbers must be an even number?
: 5選2有 10種
: 兩奇數個加起來是偶數有
: 1, 3
: 1, 5
: 3, 5
: 所以3/10 = 30%
: : ANS: (100% 或 30% ) 好像是30 韓文太醜 看不懂
: : 以上4題 拜託各位了 <(_ _)>
第四題的要求中two odd numbers的意思是選兩相異數還是奇數?
如果是奇數的話不就是100%了???
--
WE MBCREW!!!
GOT
MOTHER'S BEAT
IN
THE
FOREVER HOUSE!!!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 118.231.73.106
推
02/17 23:56, , 1F
02/17 23:56, 1F
→
02/17 23:56, , 2F
02/17 23:56, 2F
→
02/18 00:00, , 3F
02/18 00:00, 3F
→
02/18 00:00, , 4F
02/18 00:00, 4F
推
02/18 00:46, , 5F
02/18 00:46, 5F
推
02/18 00:58, , 6F
02/18 00:58, 6F
→
02/18 00:59, , 7F
02/18 00:59, 7F
討論串 (同標題文章)
本文引述了以下文章的的內容:
完整討論串 (本文為第 3 之 3 篇):