2020 National Question 12 Single-choice Differentiating 2020_新课标II Paper 12.若 $2^x - 2^y < 3^{-x} - 3^{-y}$,则( ) A. $\ln(y - x + 1) > 0$B. $\ln(y - x + 1) < 0$C. $\ln|x - y| > 0$D. $\ln|x - y| < 0$ Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →