几道数学题,不需要翻译只需要过程,着急,感激涕零,不知所云.1.Let S be a set of real numbers that satisfy the following conditions:0 is in S; Whenever x is in S then 2^x+3^x is in S; whenever x^2+x^3 is in S then x is in S.Prove:
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![几道数学题,不需要翻译只需要过程,着急,感激涕零,不知所云.1.Let S be a set of real numbers that satisfy the following conditions:0 is in S; Whenever x is in S then 2^x+3^x is in S; whenever x^2+x^3 is in S then x is in S.Prove:](/uploads/image/z/14906729-65-9.jpg?t=%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E4%B8%8D%E9%9C%80%E8%A6%81%E7%BF%BB%E8%AF%91%E5%8F%AA%E9%9C%80%E8%A6%81%E8%BF%87%E7%A8%8B%2C%E7%9D%80%E6%80%A5%2C%E6%84%9F%E6%BF%80%E6%B6%95%E9%9B%B6%2C%E4%B8%8D%E7%9F%A5%E6%89%80%E4%BA%91.1.Let+S+be+a+set+of+real+numbers+that+satisfy+the+following+conditions%3A0+is+in+S%3B+Whenever+x+is+in+S+then+2%5Ex%2B3%5Ex+is+in+S%3B+whenever+x%5E2%2Bx%5E3+is+in+S+then+x+is+in+S.Prove%3A)
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