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(10分) 先化简,再求值:,其中.

(10分) 先化简,再求值:6ec8aac122bd4f6e,其中6ec8aac122bd4f6e

 

当时,原式 【解析】【解析】 原式··········································· 2分 ··························································· 4分 ···················································································· 8分 当时,原式······························································· 10分
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(8分) 解方程:6ec8aac122bd4f6e

 

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如果记6ec8aac122bd4f6e,并且6ec8aac122bd4f6e表示当x = 1时y的值,即6ec8aac122bd4f6e6ec8aac122bd4f6e表示当6ec8aac122bd4f6ey的值,即6ec8aac122bd4f6e6ec8aac122bd4f6e表示当x = ay的值,即6ec8aac122bd4f6e

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说明: 6ec8aac122bd4f6e

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