QUESTION 3 Use the limit definition of a definite integral and the given summation formulas to evaluate (x+ x2) dx n n n(n + 1)(2n + 1) Ec = cn or or 2 2 6 2 + i =1 =1 Sketch the graph of f(x) by finding Domain: Intercepts: Asymptotes Critical Points: Interval(s) of Increasing: Interval(s) of Decreasing Interval(s) of Concave Up: Interval(s) of Concave Down: Inflection Points: X -4 8 1 (x ) = 1' (x ) = 1" (x) = - x -4 (x - 4 ) 2 (x -4)