Final Part 2 Question 3.
n=1024 |x-xgold|=1.75907e-15 T=0.00012653 sec
n=2048 |x-xgold|=2.29158e-15 T=0.000293038 sec
n=4096 |x-xgold|=3.44504e-15 T=0.00062463 sec
n=8192 |x-xgold|=4.90496e-15 T=0.00130475 sec
n=16384 |x-xgold|=6.80911e-15 T=0.00263931 sec
n=32768 |x-xgold|=9.504e-15 T=0.00528013 sec
n=65536 |x-xgold|=1.36574e-14 T=0.01183 sec
n=131072 |x-xgold|=1.92552e-14 T=0.0290255 sec
n=262144 |x-xgold|=2.71075e-14 T=0.0584185 sec
n=524288 |x-xgold|=3.84331e-14 T=0.119005 sec
Running time is O(n^1.02652)
Correct!  Computations of x are consistent and O(n)!