need some help with these math questions, thank you!!

keepmeposted

1 if x is positive, which of the following could be the correct ordering of 1/x,2x, and x^2?



correct answers: X^2<2x<1/x

And

X^2<1/x<2x



2 A committee of three people is to be chosen from four married couples. What is the numer of different committees that can be chosen if two people who are married to each other cannot both serve on the committee?

correct answer: 32

neo19

第一个问题应该是三个区间讨论？
(0，1）（1，2）（2，正无穷）
但是答案不对啊。。。

8C3－4＊6＝32