Set up equatiojn
with var a and b
(a) * (a + b) * (a + 2b) = 64
Expand
a^3 + a^2*b + a^2*2b + ab^2 = 64
graph it:
https://www.desmos.com/calculator/fkcrxzgdfy
lowest possible value for b is... 4...
4, 4, 4, is an arithmetic sequence with a common difference of 0.
ok bye bye