En branchant \( S_n = 155 \), \( a = 5 \), et \( d = 4 \): \( 155 = \fracn2 [2(5) + (n - 1)4] \). - AMAZONAWS 📅 March 6, 2026 👤 scraface Mar 06, 2026
![En branchant \( S_n = 155 \), \( a = 5 \), et \( d = 4 \): \( 155 = \frac{n}{2} [2(5) + (n - 1)4] \).](https://soloferat.biz.id/images/en-branchant--sn--155---a--5--et--d--4---155--fracn2-25--n---14-.jpg)
