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ZX-83FC63F81A2026年8月美国A卷 · 第 20 题
2026年8月美国A卷 · 原库模块 2 · Q20 参考答案
The function \( f \) is defined by \( f(x)=a(2.1^x+2.1^b) \) , where a and b are integer constants and \( 0<a<b \) . The functions g and h are equivalent to function \( f \), where k and m are constants. Which of the following equations displays the y-coordinate of the y-intercept of the graph of \( y=f(x) \) in the xy-plane as a constant or coefficient?
I. \( g(x)=a(2.1^x+k) \)
II. \( h(x)=a(2.1)^x+m \)
I. \( g(x)=a(2.1^x+k) \)
II. \( h(x)=a(2.1)^x+m \)
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