問題詳情
15.已知
，其中a，b ，c，d ，e 為正整數。若a，b ，c，d ，e 為等比遞增數列，且c − b為一個 10 的倍數的正整數，試求a + b + c =___(15)___。
，其中a，b ，c，d ，e 為正整數。若a，b ，c，d ，e 為等比遞增數列，且c − b為一個 10 的倍數的正整數，試求a + b + c =___(15)___。
參考答案
答案：B
難度：非常簡單0.929982
統計：A(3),B(518),C(5),D(18),E(0)
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