proba-sage-jupyter.ipynb

Kernel: SageMath 6.10

a, q, k, n = var('a, q, k, n')
show(sum(a*q^k, k, 0, n))

sage.version.version

'6.10'

%display latex

x, b, c = var('x b c')
solve([x^2 + b*x + c == 0],x)