Question

下列計算正確的是（　　）                                                                     

A．a²a³=a⁶                    B．（﹣2ab）²=4a²b²                                      

C．（a²）³=a⁵              D．3a³b²÷a²b²=3ab                                          

Answer 1

B【考點】整式的除法；同底數冪的乘法；冪的乘方與積的乘方．                  

【分析】根據同底數冪的乘法、積的乘方、冪的乘方、整式的除法，即可解答．                 

【解答】解：A、a²a³=a⁵，故正確；                                                         

B、正確；                                                                                          

C、（a²）³=a⁶，故錯誤；                                                                        

D、3a²b²÷a²b²=3，故錯誤；                                                                     

故選：B．                                                                                          

【點評】本題考查了同底數冪的乘法、積的乘方、冪的乘方、整式的除法，解決本題的關鍵是熟記同底數冪的乘法、積的乘方、冪的乘方、整式的除法的法則．