%%

Gaokao Math Practice Question

12. (5 分) 已知函数 $f(x)=x^{2}-2 x+a\left(e^{x-1}+e^{-x+1}\right)$ 有唯一零点, 则 $a=(\quad)$

  1. A.$-\frac{1}{2}$
  2. B.$\frac{1}{3}$
  3. C.$\frac{1}{2}$
  4. D.1 \section{

Want to know if you got it right?

Answer this and thousands more real Gaokao previous-year questions free, get graded instantly, and climb the global ranked leaderboard.

Practice Gaokao free →

More Gaokao Math questions