1. Is xy>xsquare*ysquare
a)14*xsquare=3
b)ysquare=1
Answer is E. 但我觉得是C
2 If an interger n is to be chosen at random from the intergers 1to 96, what is the probability that n(n+1)(n+2) will be divisible by 8?
Answer is 5/8.
3. At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly p, in dollars, determined by the formula p=9.5+0.25(s-1). An employee with a salary grade of 5 receives how much more dollars per hour than an employee with a salary grade of 1?
Answer is $1.25. 但我算了好几次觉得是$1.
谢谢了.
a)14*xsquare=3
b)ysquare=1
Answer is E. 但我觉得是C
y=-1，x为正的时候不可以，所以是E
2 If an interger n is to be chosen at random from the intergers 1to 96, what is the probability that n(n+1)(n+2) will be divisible by 8?
Answer is 5/8.
当n为偶数或者是n为奇数但是n+1是8的倍数的时候成立（在网吧，没有草纸，不好意思没法写过程）
3. At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly p, in dollars, determined by the formula p=9.5+0.25(s-1). An employee with a salary grade of 5 receives how much more dollars per hour than an employee with a salary grade of 1?
Answer is $1.25. 但我算了好几次觉得是$1.
P1=9.5
P5=9.5+1
应该是1
GWD上有不少答案是错的
谢谢了.
1. Is xy>xsquare*ysquare
a)14*xsquare=3
b)ysquare=1
Answer is E. 但我觉得是C
y=-1，x为正的时候不可以，所以是E
我认为无论x,y取正或负时,结果xy总 < x的平方*y的平方.所以还是选C.
谢谢
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