Bruce, please check the answers to your test suite. Granted, it has been a while since I took calculus in college, but I'm pretty sure the answers aren't all zero. :-)
Never mind...just noticed you were looking for the error differences, and not the actual values. It's been a while since I took a Reading Comprehension class as well...
This is an "honor system" test suite. For the last case, quad('2*x',0,2) gives 3.9999999999999996, while trapz([0:1/n:2],[0:2/n:4]) gives the exact answer 4 for all values of n from 1 to 100, except n=35, 44, 51, 69, 92, or 100, which all give the same answer as quad.
Angle of triangle
sum of non-primes
Find the logic
Volume and area of a sphere
How long do each of the stages of the rocket take to burn?
Find the nearest integer
How many days does the cat take to climb out of the hole?
Pythagorean perfect squares: find the square of the hypotenuse and the length of the other side
Is A the inverse of B?
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