48b13?projector=1 Open with Mat 263 SHOW ALL WORK ON NOTEBOOK PAPER Lab 1 (Test

Question

48b13?projector=1 Open with Mat 263 SHOW ALL WORK ON NOTEBOOK PAPER Lab 1 (Test 3) Identify the open intervals where the function is changing as requested 1) Decreasing 6-5-4-3-2 2 3 415 6x -2 -3 Find all the critical numbers of the function. A)-3, B)-3 2' 2 25 B) 5 C)-5 D) 2 Find the open interval(s) where the function is changing as requested. 4) Decreasing fox)-X6 4) Decreasing fx-2 A) C,-2) D) none Solve the problem. 5) A manufacturer sells telephones with cost function C(x)-668s-0.0002x2, s 800 and revenue unction R(x) = 9 2x-0002x2, 0 sx s 800. Determine the interval (s) on which the profit function is increasing. D) (0, 7700) A) (0, 700) B) (700, 800) C) (50, 650) Page 1 2+

Explanation / Answer

Dear Student

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As clealry inidcated in the graph, the value f f(x) is

a) Increasing from -Infinity to -3

b) Decreasing from -3 to 0

c) Increasing from 0 to 3

d) Decreasing from 3 to Infinity

Hence the solution is

f(x) is decresing from [-3,0] U [3, Infinity)

Hence solution is Option B

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