one variable and systems of equations in two variables · 第 17 题

one variable and systems of equations in two variables · 原库模块 1 · Q17 原库参考解析

The graph of the function f, defined by \( f\left(x\right)=-\frac{1}{2}\left(x-4\right)^2+10 \)  , is shown in the xy-plane above. If the function g (not shown) is defined by g(x) = -x + 10, what is one possible value of a such that f(a) = g(a) ?