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Openai/695dfc16-b2ac-8005-980b-b86d96450929
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=== User: 1.整理最後一項餘弦值位於第幾象限 === 1.整理最後一項餘弦值位於第幾象限 9.專家許先生評估人在交往、曖昧關係中承受的風險,有自身承受風險Rs和對方承受風險Rm,且評估兩人之綜合風險,其中算術綜合風險Ra為(Rs+Rm)/2,幾何綜合風險Rg為√(Rs×Rm),請問下列何者正確 (1)甲和乙的關係中甲承受風險90/a,乙承受風險a,且0<a<1,兩人的算術綜合風險Ra可能是3√10 (2)丙承受風險Rs=81,丁承受風險Rm與Rs之關係為logRm=(log2/log3)•logRs,則兩人的幾何綜合風險Rg=36 (3)兩人承受風險不相等時,數據Rs、Rm和Ra之標準差必會大於Rs、Rm和Rg之標準差 (4)一對情侶Rm>Rs,可用一指數函數過(x1,Rs)、(x2,Rg)、(x3,Rm)三點,且x3-x2=x2-x1 (5)承上題,通過(x1,Rs)、(x2,Rg)、(x3,Rm)三點之圓可能與該指數函數交五點 (選項3先不用證明,代(1,3,9)和(1,5,9)看看即可,選項五注意圓和指數函數最多交四點)
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