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ZX-B54B7EC3992024年11月B卷(易) · 第 17 题
2024年11月B卷(易) · 原库模块 2 · Q17 原库参考解析
The function \( f \) is defined by \( f\left(x\right)=a^x+b \), where \( a \) and \( b \) are constants and \( a>0 \). In the xy-plane, the graph of \( y=f\left(x\right) \) has a y-intercept at \( \left(0,-20\right) \) and passes through the point \( \left(2,\ 43\right) \). What is the value of \( a−b \)?
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