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Average value of a function

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Question 1 of 8

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The following function data are given

\[f(z)=-3\,z^{3} + 2\,z^{2} - z - 2\]
\[z\in[-1,\;2]\]

Give exact values

(a)1 mark

Calculate the average value of the function

Format: Exact value
(b)2 marks

Enter the definite integral and the interval width