I solved the first test suite symbolically to make sure I was on the right path an got:
[1.0, 6.4839432567518947511762312927844, 9.0049224364695494006414430797622, 8.992494072596270056922480305016, 6.9752731606055591524878412503205, 3.6901871946858786387135688683041, 0].
I am not sure why it would be wrong.
Dy = diff(y);
Sorry David. I made a mistake with the signs in the last term of the equation. I "modified" the problem description (quotes intentional). This version should work, but please let me know if it doesn't.
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Determine Whether an array is empty
Height of a right-angled triangle
Find integer solutions to an equation with a sum of binomial coefficients
Evaluate the zeta function for real arguments > 1
Iterate the sum of divisors and totient
Test approximations of the prime counting function
Find pairs of primes with the same digit sum and a specified separation
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