Bac Série B Bénin
Benin Baccalauréat Série B (Lettres - Sciences Sociales)
Applied MathematicsEnglish
Exam overviewPractice session
An arithmetic sequence $(u_n)$ has first term $u_0 = 15$ and common difference $r = 4$. What is the value of the term $u_{20}$?
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