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Mathematics, 06.11.2021 05:20 mr663656

Octave s'intérese au nombre de ses ascendants à l'aide d'un arbre généalogique sur lequel apparaisent uniquement les parents ( père et mère ) de chaque personne. Ses ascendants au premier rang sont son pèrè et sa mère, ses ascendants au second rang ses grand-père et grand-mère, . . . ..

1°/ Combien a-t-il d'ascendants au second rang ?
2°/ Combien a-t-il d'ascendants au troisième rang ?
3°/ Combien a-t-il d'ascendants au huitième rang ?
4°/ Peux-tu donner une formule qui exprime le nombre d' ascendants au nième rang, quel que soit la valeur de n ?

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Octave s'intérese au nombre de ses ascendants à l'aide d'un arbre généalogique sur lequel apparaisen...
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