这里如何看出优先股全额可转化的？

17题没看懂 答案怎么来的？能详细解释一下么？

a sports car, purchased for $200,000, is financed for five years at an annual rate of 6% compounded monthly. If the first payment is due in one month, the monthly payment is closest to: 答案里是按后付年金计算的,题中"If the first payment is due" due 不是先付年金的意思吗？

A perpetual preferred stock makes its first quarterly dividend payment of $2.00 in five quarters. If the required annual rate of return is 6% compounded quarterly, the stock's present value is closest to：？ 原版书课后题，答案的解答我没看懂

在计算CFI时，NBV(E)=NBV(B)+purchase-disp. NBV-当年D&A，这里的折旧摊销是需要计算被处置资产的折旧摊销吗？

这里的分母加权平均股份数，为什么不包括3500？？

有Q0还是Q1不是上下约分都消掉了吗？

高是怎么求出的？

为什么这里求x的均值，不是用x1＋x2的和除以2呢？而是用x1乘以p1＋x2乘以p2？x拔不是求平均数么？

融券业务时，借股票是找谁借？需要其他费用吗？