Question

La position d'un objet en mouvement est décrite par \( s(t) = t^4 - 8t^3 + 18t^2 \). Trouvez la position de l'objet à \( t = 3 \).

Ask by Norris Barrett. in Côte d'Ivoire
Jan 19,2025

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La position de l'objet à \( t = 3 \) est de 27 unités.

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Pour trouver la position de l'objet à \( t = 3 \), il suffit de substituer \( t \) par 3 dans l'équation \( s(t) = t^4 - 8t^3 + 18t^2 \). Calculons donc : \[ s(3) = 3^4 - 8(3^3) + 18(3^2) \] \[ = 81 - 8(27) + 18(9) \] \[ = 81 - 216 + 162 \] \[ = 81 - 216 + 162 = 27 \] Ainsi, la position de l'objet à \( t = 3 \) est \( s(3) = 27 \).

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