A.163 cmb.167 cmc.171 cmd.175 cm

Bab Barisan dan Deret
Matematika SMP Kelas IX

U3 = 15
U4 = 19

b = U4 – U3
b = 19 – 15
b = 4

U40 = U4 + 36b
U40 = 19 + 36 x 4
U40 = 19 + 144
U40 = 163 cm

jawabannya A