标题: GWD Q5-28 MATH [打印本页] 作者: gifile 时间: 2006-3-22 13:12 标题: GWD Q5-28 MATH
this year Henry will save a certain amount of his income, and he'll spend the rest. Next year Henry will have no income, but for each dollar that he saves this year, he'll have 1+r dollars available to spend. In terms of r, what fraction of his income should Henry save this year so that next year the amount he was available to spend will be equal to half the amount that he spends this year ? A. 1/r+2 B. 1/2r+2 C. 1/3r+2 D. 1/r+3 E. 1/2r+3 請高手賜教 謝謝!!作者: smilinglan 时间: 2006-3-22 19:24
