and $a_ = $. first prove by induction on $m$ that $a_{n+m}=\dfrac{ +a_ma_n}{a_m+a_n}.$ it follows that $a_{ n}=\dfrac{ +a_n^ }{ a_n}$. now prove by induction that $b_{n+ }=a_{ ^n}$. share | cite | improve this answer edited hours ago answered hours ago j. w. tanner j. w. tanner . k gold badge silver...
carré, rectangulaire ipn.e. ronds plein, plats cornières profils spéciaux, z, omegas rayon de cintrage de tube et de profil les rayons minimum de cintrage ne pourront être indiqués ou réalisés qu'après étude en fonction de nos capacités et de nos contraintes de fabrication. cintrage par induction...
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