U2=7 dan u6=19 tentukan suku ke41

U2 = a + b = 7
U6 = a + 5b = 19
4b = 12
b = 3

a + b = 7
a + 3 = 7
a = 4

U41 = a + 40b
= 4 + 40 (3)
= 124

jawab

u2 = 7
u6 = 19

u6 - u2 = 19-7
4b = 12
b = 3

u41= a + 40b = a+5b + 35b
u41 = u6 + 35 b
u41 = 19 + 35(3)
u41 = 124