Can I get some help with these questions please!

1. Find all open intervals on which the function f(x) = x2 + x -2 is decreasing 2. Find all critical numbers for the function f(x) = (9 - 2-2)3/5 3. Find the values of x that give relative extrema for the function f(x) = (x + 1)2(x -2) 4. Find all intervals on which the graph of the function is concave upward : f(x) = - x + 3 5. If f"(x) = 3x2 -4 and f(x) has critical numbers -2, 0 and 2. Determine which critical numbers, if any, gives a relative maximum. 6. Find all asymptotes of the functions : f(x) = - V2x + 1 7. Find the limit : lim (cos(1/x)) 8. Find all points of inflection: f(x) = x3 - 12x 9. A farmer has 160 feet of fencing to enclose 2 adjacent rectangular pig pens. What dimensions should be used so that the enclosed area will be a maximum? 10. Find all extrema in the interval [0, 27] for f(x) = x - cos(x)