NẾU   D 1 L N X C X  X  X XA. F   12 LN C. B. F X...

Câu 2. Nếu   ^{d 1 l n x C}

 

x  x  x 

x

A. ^f   ¹

₂

^{ln C}

. B. ^{f x}   ^x

₂

¹

.

f x   x  

C. ^f   ^{x  x  ln x  C} _{. D.}   ^{x 1 ln x C}