[計量] 幾題數學求解

看板GRE作者grassroots (阿根)時間5年前 (2018/09/08 00:48)推噓5(5推 0噓 11→)

留言16則, 3人參與討論串1/1

1. For a nonnegative interger n, if the remainder is 1 when 2^n is divided by 3, then which of the following must be true?(多選) A. n is greater than 0 B. 3^n=(-3)^n C. 根號2^n is an integer 2. If y is inversely proportional to x and y is 15 when x=5, what is the value of y when x=25? 我是算y:x=15:5=75:25 故y=75. 但答案是y=3, 請問是我哪邊理解錯了？ 3. {a,b} represents the remainder when a is divided by b. c and d are positive intergers with c<d.(比大小) A: {c,d} B: {d,c} 4. If p and q are primes greater than 2, which of he following must be true? (多選) A. p+q is even B. pq is odd C. p^2+q^2 is even D. 4p-q is even E. p/2+q/2 is even 5. 這題我真的有看沒有懂... Pat drove from his home to school at 60 miles per hour. Returning over the same route, there was a lof of traffic, and he was only able to drive at 40 miles per hour. If the return trip took 1 hour longer, how many miles did he drive for the round trip? (填空) 先謝過板上高手了 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 36.231.99.203 ※ 文章網址: https://www.ptt.cc/bbs/GRE/M.1536338937.A.F21.html

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wenwen0616

09/09 12:25, 5年前 , 1^F

09/09 12:25, 1^F

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wenwen0616

09/09 12:25, 5年前 , 2^F

09/09 12:25, 2^F

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Jincheng56

09/09 12:27, 5年前 , 3^F

09/09 12:27, 3^F