SAT OG 2道数学题,牛人帮帮忙啦~~
P598 就是有5个正方形卡片,其中一张不能放在最后,问有几种安排方式?
a,3a~~~
the first term in the sequence above is a,and each term after the first is 3 times the preceding term,if the sum of first 5 terms is 605,what is the value of a?我怎么算都是5啊,可答案是6!
人气:498 ℃ 时间:2020-05-11 06:30:11
解答
1.A5-A4 =96
5 4
2.
5,15,45,135,405,明显答案错 不可能6的倍数最终结果是5的
推荐
猜你喜欢
- 两条直角相交,组成四个角,如果其中一个角是90°,那么,这两条直线的位置关系叫做( )
- 判断2001的2003次方加2002的2001次方的末尾数字,判断2的2005次方加7的2005次方的末尾数字如题 谢谢了
- 余弦公式
- 在三角形ABC中,已知a=根号3,b=根号2,B=45度,求A,C及c
- there are about four hundred and fifty k_______ of dog on the earth讲狗的
- My new glasses cost me_____ the last pair that i brought.
- A fire broke out in the factory last night.
- 鳍的读音?