[計量] 10/5~10/11 印度數學問題
我有幾題印度數學不會，麻煩大家教我一下，感謝~~~
10.5印度數學
http://www.drrajus.com/forum/viewtopic.php?t=7874
1. Given that (3 + x)/(5 + x) = x^2/5. Find the value of x?
2. In a set of first 9 consecutive odd numbers. Find the difference of largest and smallest number of the set?
第3題，做的時候我想到之前補習的時候，好像有做到類似題，好像是幾何平均(還是平均標準差?)和標準差比較，可否有高手有印象做過這類的標準差題目，我手邊目前找不到。感謝!
4. Given that a person buys 10 varieties of 50 shirts for $49. If he sells, every 2 shirts for $10, then find the profit he received?
8. Find the value of sqrt((6.497*50.729)/5.064)?
第9題求陰隱面積 我算出pi/16，和印網答案不同
10. Given a series s1, s2, s3, ……. sn, if s1 = 6 and every number in the series is 1/2 times greater than the previous number, then
Col A: s100
Col B: some value (xxx)
這題題目不太懂他意思
10.6印度數學
http://www.drrajus.com/forum/viewtopic.php?t=7876
2. When ‘x’ is divided by 4, it gives remainder 1 and when ‘y’ is divided by 4, it gives remainder 1. Find the remainder of product ‘xy’ when divided by 4?
這題我不會算
第4題 沒設條件 不知道答案
6. Given the first term of a series as 4, if every next term is sum of 2 and 1/2 of its previous term, find the approximate value of 100th term?
這我算錯，答案是4，不曉得怎麼算
7. Given the circumference of a circle as 4sqrt(5)π. Find the area of the rectangle? (還有圖)
這題我也算不出來?
10/11印度數學
http://www.drrajus.com/forum/viewtopic.php?t=7889
2. Col A: 1/101 – 1/103 + 1/102 + 1/104
Col B: 1/101
答案是A...我覺得是B，誰指教一下...
3. Col A: Average of a set of five different numbers with 10 and 15 included
Col B: Average of a set of five different numbers with -10 and -15 included
答案是A和D都有，我選D，不曉得哪個對還是錯...
4. What is the approximate value of (1501 * 30.405)/20.78?
這前面出現過，我不會算...Orz
7.
Given the circumference of a circle as 4sqrt(5)π, find the area of the rectangle?
這前面也出現過，他答案是32，我不會算...Orz
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