15.股票市盈率那道题: This year stock price increase by k% from last year. Earning increases by m%.P》R 求Price/Earning ratio increases X%. What is the increase of ratio of increase in price and earnings ….问价格比收益的比例上升百分之几?(100*(K-M)/(100+M))
什么意思,我怎么做的是(K%-M%)/M%???
24.For all x, x is positive integer, \"2-height\" is defined to be the greatest nonnegtive n of x,what is the greatest number of 2-height when 2^n (2的n次方) is the factor of x?
A. 2
B. 12
C. 40
D. 76
E. 90
C. 40(各选项质因数分解后,指数最大者)