11.設α 、β為方程式3^-x^2+5x+1-27=0的兩根，則α2+β2=？(A)21(B)22(C)23(D)24

12.設\( f(x) = 3^x \), \( g(x) = \log_{\frac{1}{3}} x \)，則下列選項何者正確？(A)若x1<x2，則\( 3^{x_1} > 3^{x_2} \)(B)若x1<x2，則\( 3^{x_1} + 3^{x_2} = 3^{x_1+x_2} \)(C)若x1<x2，則\( \log_{\frac{1}{3}}(x_2 - x_1) = \log_{\frac{1}{3}} x_2 - \log_{\frac{1}{3}} x_1 \)(D)若x1<x2，則\( \frac{\log_{\frac{1}{3}} x_2 - \log_{\frac{1}{3}} x_1}{x_2 - x_1} < 0 \)