Question

(每小题7分，共14分)

(1)计算：︱一2 ︱+()^-1×(π一)⁰一+(一1) ²；

(2)解方程：x—1=．

 

Answer 1

(1)解：原式=2+3×1—3+1                                ……5分

                  =3．                                        ……7分

    (2)解：(x-2) ²-(x²-4)=3                                     ……3分

                    -4x=-5

                      x=；                                  ……5分

    经检验，x=是原方程的解．                                 ……7分

 

解析:略