tulung dibantu ya flisss

a][
P(n) = 5/ n(n + 1)

P(n + 1)
= 5/ (n + 1)(n + 1 + 1)
= 5/ (n + 1)(n + 2)
= 5/(n² + 3n + 2)

b][
P(n) = 3 / (n + 2)(n + 3)

P(n + 1)
= 3 / (n + 1 + 2)(n + 1 + 3)
= 3 / (n + 3)(n + 4)
= 3 / (n² + 7n + 12)