In Exercises 3-8, find the limit of each function (a) as x ->co and (b) as x - -co. (You may wish to visualize your answer with a graphing calculator or computer.) F 3. f(x) = - 3 4. f( x) = 1 - 3 5. g(x) = 6. g(x) = 2+ (1/ x) 8 - (5/x2) 3 -5+ (7/x) 3 - (2/x) 7. h(x) 8. h(x) 3 - (1/x2) 4 + (V2/x3 )