Determine the open intervals on which the graph of the T T function y = 4x-tan(x), 2 2 upward or concave downward. Select one: a. concave upward: 0, C. d. I I b. concave upward: 2-3015-20 8 O e. :(0,7) concave downward: concave upward: I S 78 downward: downward: 1, concave 1-2-73-3) concave upward: 1. 1 IT 2 is concave concave downward: concave upward: ग I 2 8 X : concave (-1,0): Conc Incorrect I concave

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