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(泸州)计算:.
(泸州)化简:.
(凉山州)计算:.
(凉山州)先化简:,然后从的范围内选取一个合适的整数作为x的值代入求值.
(资阳)先化简,再求值:,其中x满足.
(宜宾)计算:.
(宜宾).
(遂宁)计算:.
(遂宁)先化简,再求值:,其中.
(内江)(本小题满分7分)计算:.
(内江)(1)填空:= ; = ; = . (2)猜想:= (其中n为正整数,且). (3)利用(2)猜想的结论计算:.
(达州)计算:.
(达州)化简,并求值,其中a与2、3构成△ABC的三边,且a为整数.
(南充)计算:.
(成都)(本小题满分6分)化简:.
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