Apologies, but I don't think all screen-grabs are showing up
The code in lecture 7, for my 2nd question, reads:
function add(...)
local sum = 0
for _, n in ipairs ({ ... }) do
sum = sum + n
end
return sum
end
df = derivative(function (x) return x * x * x end)
print(df(5))
and gives the output
input:8: attempt to call a nil value (global 'derivative')
The 3rd question I asked just quotes that
