CÂU 38. ĐÁP ÁN A. ÌÏ ³ÏÍXĐKXĐ

1 : 1 1P x x x x

3

1ỉ ư÷ç ÷ỉ + + - - ư÷ç + ÷1 4x x x=ççççè - + + - - ÷÷÷÷ø: 1

(

^{x 12}

)(

^{xx 1 x 1}

)

^{x1 1}ç + +x xè ø= - + + + + ⁼

(

^{x -1x}

)(

^{-x+x x +1}

)

^{.x +x -x 3+1(x ¹9)}

(

^{2xx+ - -11}

)(

^{xx xx -11}

)

^{:x x -x 3 1}

( )

= - =