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grin007 [14]
2 years ago
8

Please please help *image attached* it’s ap calc ab

Mathematics
1 answer:
vaieri [72.5K]2 years ago
8 0

The average rate of change of a function f(x) over some interval [a, b] is the difference quotient,

\dfrac{f(b)-f(a)}{b-a}

which corresponds to the slope of the line connecting the points (a, f(a)) and (b, f(b)) in the graph of f(x).

Given f(x) = 3x² - x³ (correct me if I'm wrong, the exponents look cut off in your screenshot), the average rate of change on [1, 5] is

\dfrac{f(5)-f(1)}{5-1}=\dfrac{(3\cdot5^2-5^3)-(3\cdot1^2-1^3)}4 = \dfrac{75-125-3+1}4 = \boxed{-13}

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