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Find the average rate of change of f(x) = -2x² + 5:

(a) From 0 to 2
(b) From 3 to 5
(c) From -2 to 1

1 Answer

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Final answer:

The average rate of change of f(x) = -2x² + 5 is -4 from 0 to 2, -16 from 3 to 5, and 2 from -2 to 1.

Step-by-step explanation:

To find the average rate of change of a function, we can use the formula: average rate of change = (f(b) - f(a)) / (b - a), where a and b are the given values.

(a) From 0 to 2:

f(0) = -2(0)^2 + 5 = 5

f(2) = -2(2)^2 + 5 = -3

Average rate of change = (-3 - 5) / (2 - 0) = -4

(b) From 3 to 5:

f(3) = -2(3)^2 + 5 = -13

f(5) = -2(5)^2 + 5 = -45

Average rate of change = (-45 - (-13)) / (5 - 3) = -16

(c) From -2 to 1:

f(-2) = -2(-2)^2 + 5 = -3

f(1) = -2(1)^2 + 5 = 3

Average rate of change = (3 - (-3)) / (1 - (-2)) = 2

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