Question

Suatu barisan bilangan u5 = 15 , u40 = 260 . Tentukan u200 ? Tolong d jwab please...

Answer 1

260 = a + 39b
15 = a + 4b
____________-
245 = 35b
b = 245/35
b = 7

substitusi b=7
15 = a + 4b
15 = a + 4.7
15 = a + 28
a = -13

U200 = a + 199b
= -13 + 199.7
= -13 + 1393
= 1380