Rumus suku ke-n barisan -90,-86,-82,-78,…

By Admin ReiPosted on December 3, 2022

Rumus suku ke-n barisan -90,-86,-82,-78,…

$u1 = a = - 90 \ b = u2 - u1 = - 86 - ( - 90) = 4 \ \ un = a + (n - 1)b \ un = - 90 + (n - 1)4 \ un = - 90 + 4n - 4 \ un = - 94 + 4n$