QUESTION IMAGE
Question
g(t) = -(t - 1)^2 + 5
what is the average rate of change of g over the interval -4 ≤ t ≤ 5?
Step1: 计算\(g(-4)\)
将\(t = -4\)代入\(g(t)=-(t - 1)^2 + 5\),得:
\(g(-4)=-(-4 - 1)^2 + 5=-(-5)^2 + 5=-25 + 5=-20\)
Step2: 计算\(g(5)\)
将\(t = 5\)代入\(g(t)=-(t - 1)^2 + 5\),得:
\(g(5)=-(5 - 1)^2 + 5=-16 + 5=-11\)
Step3: 计算平均变化率
平均变化率公式为\(\frac{g(b)-g(a)}{b - a}\),其中\(a=-4\),\(b = 5\),则:
\(\frac{g(5)-g(-4)}{5 - (-4)}=\frac{-11-(-20)}{5 + 4}=\frac{9}{9}=1\)
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