by reading values from the given graph of f, use five rectangles to find a lower estimate and an upper estimate for the area under the given graph of from x=0 to x=10. in each case sketch the rectangles that you use.
The Attempt at a Solution
since their are there are 5 rectangles, the width was 2 for each of them
and when i tried to figure out the lower and upper estimate i did this
L5= 2*O^2+ 2*2^2 ..... 2 * 8^2 =128
and the answer in the back of the book is 40
and for Right end= 2*2^2 ..... 2*10^2= 440
and the answer is 52