我马上要考试,几道新机警,求助!!急!!!!

monicamomo

ask the unit digit of p^xy
(1) the unit digit of p^x is 1
(2) the unit digit of p^y is 1
题都没看懂,帮忙解释一下及思路

. an(subscript)=a1*k ask k=?
(1) a1=1
(2) a5=16
Answer: C
没明白题目说什么?

11. fuel of the first 2 mile is 15 dollars. And the rest cost at a fixed price. Ask the cost of 14 miles.
(1) 3.5 miles cost 20 dollars
(2) x (specific number) miles cost 40 dollars.
我觉得答案是D ,可机警说是B,求确认

  Y=km+b ask the slope of K
(1) line y=(1-m)b+a parallel Y
(2) Y intersect with line y=2x+3 at point (2.7)
答案是A 吗?

linlin315

我马上要考试,几道新机警,求助!!急!!!!
ask the unit digit of p^xy
(1) the unit digit of p^x is 1
(2) the unit digit of p^y is 1
题都没看懂,帮忙解释一下及思路
这道题的意思是：p的xy次方的各位是多少？个位为1的任何次方都为1。所以答案是D吧！！
是这个答案吗？？

linlin315

. an(subscript)=a1*k ask k=?
(1) a1=1
(2) a5=16
Answer: C
没明白题目说什么?
这道题的意思是：数列第n项An=A1*k求k=?
所以答案应是C

linlin315

11. fuel of the first 2 mile is 15 dollars. And the rest cost at a fixed price. Ask the cost of 14 miles.
(1) 3.5 miles cost 20 dollars
(2) x (specific number) miles cost 40 dollars.
我觉得答案是D ,可机警说是B,求确认
同意！！我认为应是D
  

[此贴子已经被作者于2003-4-17 18:08:23编辑过]

linlin315

Y=km+b ask the slope of K
(1) line y=(1-m)b+a parallel Y
(2) Y intersect with line y=2x+3 at point (2.7)
答案是A 吗?
不知道这题中b,m,a那个是常量啊！那个是变量啊！如果题中没说我认为还不能确定答案！
不知道jj的答案是什么啊？？

joywzy

11,D吧.

oddyuibe

11题应该是D

personal view~