E 2713 L'IF = dtf e (ac) f0 t2+32 or oo

Let - dt for oo < < +00 o t2 + 32 (a) Find the value of x where F obtains its maximum value. (b) Find the intervals over which F is only increasing or decreasing. Use interval notation using U for union and enter "none" if no interval. Intervals where F is increasing: Intervals where F is decreasing: (c) Find open intervals over which F is only concave up or concave down. Use interval notation using U for union and enter "none" if no interval. Intervals where F is concave up: Intervals where F is concave down: