Chapter 7.5, Problem 43E

For each of the following graphs, obtain a lower bound L(A) for the area enclosed by the curve by adding the areas of the squares enclosed completely by the curve. Then obtain an upper bound U(A) for 1 1 the area by adding the areas of the squares enclosed either partially or completely by the curve. (Notice: the squares in the first graph are 1 by 1 squares and the squares in the second graph are by 2 2 squares.)

2 -P(x) = x +8x² 10 P(x) If p(x) = 4x-3 and r(x) = 1+ 3x, find each value. 133. p(a) 144. r(2a) 155. 3r(a) 16 6.-4p(a) 17. pla) 188. r(x+2)