tolong jawab pake cara kalo ad

U1 = 4
U2 = 8 - 1 = 7
U3 = 12 -2 = 10

U45 = 45 ( 4 ) - ( 45 -1 )
180-44 = 136

Dik: a=4
b=7-4
=3
Dit:pola ke 45
Jwb: Un=a+(n-1)b
U45=4+(45-1)3
=4+44.3
=4+132
=136

Semoga membantu :)