新gre数学十大易错题型4
For the line with equation y=ax+b,the x-intercept os twice the y-intercept
比较the slope of the line 与1/2的大小,答案是D,但算出来是-1/2呀
还有截距为零的情况,所以D.
新gre数学十大易错题型5
A certain moneymarket account that had a balance of $48000 during all of last monthearned $360 in interest for the month. at what simple annual interestrate did the account earn interest last month?