 .  a. 1/4 + 5 3/4·8/9   b, 5/9 + - 4/9·- 1/2  c, ( - 2/3 )^18 : ( - 2/3 )^14 1/4 + 23/4·8/9  = 5/9 + 2/89 1/4 + 46/9 = 7/9  = ( - 2/3 )^18 - 14  = ( - 2/3 )^4 = 16/81 193/36  1, (

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 = 5/9 + 2/9  .  a) 1/4 + 5 3/4  8/9  = 1/4 + 23/4·8/9  = 1/4 + 46/9  = 193/36  b) . 5/9±4/9· - 1/2 )  c) ( - 2/3 )^18( - 2/3 )^14  = ( - 2/3 )^18 - 14  = 7/9  = ( - 2/3 )^4 =

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Giúp tớ giải bài với ạ , tớ đang cần gấp ấy 😓