Technical information
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Para [n greater or equal than 1 comma space space space space space space space space fraction numerator open parentheses n plus 1 close parentheses factorial over denominator open parentheses n minus 1 close parentheses factorial end fraction] é igual a: [n minus 1]; [n squared minus n]; [n plus 1]; [n squared plus n]
Right answer summary: [n squared plus n]
Question state: todo