2. N    d  M 1 2t; 2 t; 3 2t       1 1 2 3 22S NA; NB 32t 128t 146 4t 8 9 2       ABN 2   2 2 2maxS 3 2 4t 8 0 t 2 N 3;0;1 .   2       x 1  log 2x 1 1 4   log 5 2x 2log 2x 1 x 1 x 2             2 2log 5 2x 0 x 2 2     Câu VIIB

N    D  M 1 2T; 2 T; 3 2T       1 1 2 3 22S NA; NB 32T...

Toán DE DAP AN THI THU DAI HOC 05

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Đáp án tham khảo

2. ^N    ^d  M 1 2t; 2 t; 3 2t      

 

1 1 2 3 2

S NA; NB 32t 128t 146 4t 8 9

 

       

ABN

 

2   2 2 2

maxS 3 2 4t 8 0 t 2 N 3;0;1 .

 

  2       

x 1

 

 

log 2x 1 1 4

   

log 5 2x 2log 2x 1 x 1 x 2

 

   

         

2 2

log 5 2x 0 x 2 2

    

 



Câu VIIB