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因為四個數成等差數列,它們的和為36 所以這四個數是9-2x 9-x 9+x 9+2x 又因為積為5760 所以(9-3x)(9-x)(9+x)(9+3x)=5760 所以9x四次方-810x²;+801=0 所以x²;=1或x²;=801 所以x=1【另一個結果也成立,但是不好寫,全是根號,不是自然數】 所以四個數是6/8/10/12
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