问题如下：
What's the annual geometric mean return of below investment over three years?
选项：
A.3.8%.
解释：
A is correct.
The annual geometric mean return is [(1 + 0.2)(1-0.3)(1 + 0.15)] -1 = 0.966 -1 = -0.0115 = -1.15%
老师 为什么这道题不用根号3
PaisleyPPx · 2019年11月29日
问题如下：
What's the annual geometric mean return of below investment over three years?
选项：
A.3.8%.
解释：
A is correct.
The annual geometric mean return is [(1 + 0.2)(1-0.3)(1 + 0.15)] -1 = 0.966 -1 = -0.0115 = -1.15%
老师 为什么这道题不用根号3
NO.PZ2018070201000037 问题如下 What's the annugeometric mereturn of below investment over three years? A.-1.15%. B.2.5%. C.3.8%. A is correct.The annugeometric mereturn is [(1 + 0.2)(1−0.3)(1 + 0.15)]1/3 −1 = 0.9661/3 −1 = −0.0115 = −1.15%\;{\lbrack(1\;+\;0.2)(1-0.3)(1\;+\;0.15)\rbrack}^{1/3}\;-1\;=\;0.966^{1/3}\;-1\;=\;-0.0115\;=\;-1.15\%[(1+0.2)(1−0.3)(1+0.15)]1/3−1=0.9661/3−1=−0.0115=−1.15% Three equity funmanagers have performanrecor summarizein the following table: Given a risk-free rate of return of 2.60%, whimanager performebest baseon the Sharpe ratio?Manager 1. Manager 2 Manager 3Manager 1Sharpe ratio= (Rp-Rf)/σp=（14.38%-2.6%）/10.53cor，请问cor是怎么算的？
NO.PZ2018070201000037 之前有个类似的题没开3次方，问题问的是over three years。当时那个的题解答是如果算年化的需要开三次，over the three的话直接乘完-1
请问HPq2C计算器如何开三次方程？谢谢，
