\nEnunciado<\/b><\/span><\/p>\n
Um caracol foi observado a subir um muro com $6$ m de altura.<\/p>\n
De dia sobe $3$ m, mas de noite, enquanto dorme, escorrega $2$ m.<\/p>\n
Quantos dias ir\u00e1 o caracol demora para chegar ao topo do muro?<\/p>\n
Resolu\u00e7\u00e3o >><\/a><\/span><\/div><\/div>\n\n
\nResolu\u00e7\u00e3o<\/b><\/span><\/p>\n\n
A resposta tentadora ser\u00e1 $6$ dias, pois\u00a0o caracol est\u00e1 a $5$ m do topo do muro\u00a0no final do per\u00edodo noturno do primeiro dia.<\/p>\n
Contudo, essa resposta n\u00e3o \u00e9 correta, como vamos verificar:<\/p>\n
Dia<\/strong><\/td>\n| Per\u00edodo diurno<\/strong><\/td>\n | Per\u00edodo noturno<\/strong><\/td>\n<\/tr>\n | 1<\/td>\n | $\\begin{array}{*{20}{c}} \u00a0 {}&{}&3 \\\\ \u00a0 {}& \\nearrow &{} \\\\ \u00a0 0&{}&{} \\end{array}$<\/td>\n | $\\begin{array}{*{20}{c}} \u00a0 3&{}&{} \\\\ \u00a0 {}& \\searrow &{} \\\\ \u00a0 {}&{}&1 \\end{array}$<\/td>\n<\/tr>\n | 2<\/td>\n | \u00a0$\\begin{array}{*{20}{c}} \u00a0 {}&{}&4 \\\\ \u00a0 {}& \\nearrow &{} \\\\ \u00a0 1&{}&{} \\end{array}$<\/td>\n | $\\begin{array}{*{20}{c}} \u00a0 4&{}&{} \\\\ \u00a0 {}& \\searrow &{} \\\\ \u00a0 {}&{}&2 \\end{array}$<\/td>\n<\/tr>\n | 3<\/td>\n | $\\begin{array}{*{20}{c}} \u00a0 {}&{}&5 \\\\ \u00a0 {}& \\nearrow &{} \\\\ \u00a0 2&{}&{} \\end{array}$<\/td>\n | $\\begin{array}{*{20}{c}} \u00a0 5&{}&{} \\\\ \u00a0 {}& \\searrow &{} \\\\ \u00a0 {}&{}&3 \\end{array}$<\/td>\n<\/tr>\n | 4<\/td>\n | \u00a0$\\begin{array}{*{20}{c}} \u00a0 {}&{}&6 \\\\ \u00a0 {}& \\nearrow &{} \\\\ \u00a0 3&{}&{} \\end{array}$<\/td>\n | <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n | |
![\"\"](\"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/10\/snail-on-the-wall.jpg\" "\\"Caracol\\"")
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