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1 transparent par page - Montefiore

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Exemples<br />

◮ Multiplication <strong>par</strong> une constante :<br />

〈1, 0, 1, 0, 1, 0, . . .〉 ←→ 1 + x 2 + x 4 + x 6 + . . . = 1<br />

1 − x 2<br />

En multipliant la fonction génératrice <strong>par</strong> 2 :<br />

◮ Addition :<br />

〈2, 0, 2, 0, 2, 0, . . .〉 ←→ 2 + 2x 2 + 2x 4 + 2x 6 + . . . = 2<br />

1 − x 2<br />

〈 1, 1, 1, 1, 1, 1, . . . 〉 ←→ 1<br />

1−x<br />

+ 〈 1, -1, 1, -1, 1, -1, . . . 〉 ←→ 1<br />

1+x<br />

〈 2, 0, 2, 0, 2, 0, . . . 〉 ←→ 1<br />

1−x<br />

= 2<br />

1−x 2<br />

+ 1<br />

1+x<br />

405

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