El gráfico de la función cruce el eje N con f = 0
o sea hay que resolver la ecuación:
$$3^{- n} n = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje N:
Solución analítica$$n_{1} = 0$$
Solución numérica$$n_{1} = 117.459221316189$$
$$n_{2} = 101.48841442314$$
$$n_{3} = 115.462377722886$$
$$n_{4} = 71.5854553866931$$
$$n_{5} = 97.4974171742322$$
$$n_{6} = 55.692310784084$$
$$n_{7} = 81.5437874257798$$
$$n_{8} = 87.5240947178058$$
$$n_{9} = 77.5589234680236$$
$$n_{10} = 34.1134417707532$$
$$n_{11} = 43.8454836216248$$
$$n_{12} = 69.5955353408358$$
$$n_{13} = 75.5672084158036$$
$$n_{14} = 105.480181064576$$
$$n_{15} = 93.507302840911$$
$$n_{16} = 32.20413098631$$
$$n_{17} = 28.4723366438365$$
$$n_{18} = 59.6587733047646$$
$$n_{19} = 37.9790465327774$$
$$n_{20} = 45.8120806381933$$
$$n_{21} = 85.5303013908349$$
$$n_{22} = 57.6747944176957$$
$$n_{23} = 107.476322654616$$
$$n_{24} = 47.7825730831791$$
$$n_{25} = 79.5511307388945$$
$$n_{26} = 65.6179704559296$$
$$n_{27} = 36.0399574129987$$
$$n_{28} = 67.6063459940596$$
$$n_{29} = 111.46907041179$$
$$n_{30} = 99.4928130183687$$
$$n_{31} = 63.6305050508079$$
$$n_{32} = 61.6440620785768$$
$$n_{33} = 91.5126185270965$$
$$n_{34} = 0$$
$$n_{35} = 113.465658259293$$
$$n_{36} = 83.5368555706765$$
$$n_{37} = 49.7563063482934$$
$$n_{38} = 95.5022416936633$$
$$n_{39} = 51.73276672197$$
$$n_{40} = 41.8836307214122$$
$$n_{41} = 119.456182111128$$
$$n_{42} = 89.51820852489$$
$$n_{43} = 73.5760340327249$$
$$n_{44} = 109.472622282603$$
$$n_{45} = 53.7115449725784$$
$$n_{46} = 39.9276446546999$$
$$n_{47} = 103.484207885973$$
$$n_{48} = 30.3194520793373$$