Question

若代數式+有意義，則實數x的取值范圍是（　　）                          

A．x≠1                        B．x≥0                         C．x≠0                        D．x≥0且x≠1

Answer 1

D【考點】二次根式有意義的條件；分式有意義的條件．                                

【分析】先根據分式及二次根式有意義的條件列出關于x的不等式組，求出x的取值范圍即可．              

【解答】解：∵代數式+有意義，                                               

∴，                                                                                  

解得x≥0且x≠1．                                                                              

故選D．                                                                                            

【點評】本題考查的是二次根式及分式有意義的條件，熟知二次根式具有非負性是解答此題的關鍵．