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已知a-b=1,則代數式2a-2b-3的值是………………………………………(  )A.-1          ...

練習題2.8W

問題詳情:

已知a-b=1,則代數式2a-2b-3的值是………………………………………(  )A.-1          ...

已知ab=1,則代數式2a-2b-3的值是………………………………………(   )

A.-1             B.1                C.-5            D.5                                                                                                                                                                                                                                                                                                                                                                                                                                          

【回答】

A

知識點:整式的加減

題型:選擇題

標籤:代數式 已知 2A 2b