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L'indicateur F1 s'affiche en haut de l'écran.
• Enregistrement de l'opérateur:
SET + 5 b/c 3 F1
SET
On pourrait utiliser la touche puissance
, mais comme
nous l'avons vu, elle donnera le résultat décimal. On fera
donc des multiplications successives. Cependant, afin
de ne pas avoir à retaper 3 fois la fraction 5/3, on aura
intérêt à la mettre en mémoire. Voici comment procéder.
5 3 5
3.
5
3.
5
3.
5
3.
25
9.
5
3.
125
27.
FRACTION
ET OPERATEUR CONSTANT
On souhaite établir un tableau de valeurs de l'expression:
x + 5/3 avec -3 x 3.
Pour chaque nouvelle valeur de x, il faut ajouter 5/3. Ce
travail peut vite devenir fastidieux (encore qu'il soit
préférable à tout calcul manuel).
L'usage de l'opérateur constant se montre tout
particulièrement efficace, en pareil cas. Comme
l'opérateur peut être un entier ou un décimal, il peut être
également une fraction. Voici comment procéder:
53


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