Question: Find the open intervals on which the function f (a) - - 5x- + 4x + 8 is increasing or decreasing. Note: Use the letter

 Find the open intervals on which the function f (a) -

- 5x- + 4x + 8 is increasing or decreasing. Note: Use

Find the open intervals on which the function f (a) - - 5x- + 4x + 8 is increasing or decreasing. Note: Use the letter U for union. To enter oo, type the word infinity. If the function is never increasing or decreasing, enter NA in the associated response area. increasing: decreasing

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