Question

Tentukan suku ke 14 jika bedanya = 8 dan U8 = 52

Answer 1

Un=a+(n-1)b
=-4+(n-1)8
=-4+8n-8
=8n-12
U14=8n-12
=8(14)-12
=112-12
=100

Answer 2

Un = a+(n-1)b
52 = a+(8-1)8 Cari a nya dulu,a=angka awal/
52 = a+(7)8 suku pertama
52 = a+56
a = 52-56
= -4

U14 = a+(n-1)b
U14 = -4+(14-1)8
U14 = -4+(13)8
U14 = -4 + 104
U14 = 100