Rumus jumlah n suku pertama deret 2,8,14,20,26….

By Admin ReiPosted on October 28, 2022

Rumus jumlah n suku pertama deret 2,8,14,20,26….

Jawaban:

$sn = frac{n}{2} (4 + (n - 1)6) \ = frac{n}{2} (4 + 6n - 6) \ = frac{n}{2} ( - 2 + 6n) \ = - n + 3 {n}^{2}$

$un = 2 + (n - 1)6 \ = 2 + 6n - 6 \ = 6n - 4$

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