cara rumusannya gimana kk dan jawabany juga kk (mohon bantuannya kk)

U1 = 2
Beda = 3
U25= U1 + 24b = 2+24(3) =2+ 72 = 74

2, 5, 8, 11, ...
a = 2, b = 5 - 2 = 3
Un = a + (n - 1)b
U25 = 2 + (25 - 1)3 = 2 + (24)3 = 2 + 72 = 74