NO.PZ2022090804000020
问题如下：
A firm is considering a project that would require an initial investment of THB270 million (Thai baht). The project will help increase the firm’s after-tax net cash flows by THB30 million per year in perpetuity, and it is found to have a negative NPV of THB20 million. The IRR (%) of the project is closest to:
选项：
A.11.1%.
B.10.3%.
C.12.0%.
解释：
SolutionA is correct. The IRR is the discount rate that makes the NPV = 0. Because the cash flow stream is in perpetuity, it can be solved as follows:
0 = –270 + (30/IRR)
IRR = 11.1%
B is incorrect. It assumes a positive NPV of 20 and solves for IRR = 30/290 = 10.34%.
C is incorrect. It assumes a negative NPV of 20 and solves for IRR = 30/250 = 12.00%.
∑CF/（1+IRR）n次方求极限应该是等于多少？
