kak tolong pakai caranya ya kak:)

U4 = 7 + (4-1) 4
= 7 + 3 x 4
= 7 + 12
= 19
U5 = 2 + (4/2 ( 7 + 19))
= 2 + (4/2 (26))
= 2 + (4 (13))
= 2 + 52
= 54

U5 = 7 + (5-1) 4
= 7 + 4 x 4
= 7 + 16
= 23
U6 = 2 + (5/2( 7 + 23))
= 2 + (5/2 (30))
= 2 + (5 (15))
= 2 + 75
= 77

D. 54, 77