Deketahui barisan aritmetika 26,32,38,44,50tentukan
a.beda
b.U1+U15
c.U50-U20
Jawaban Terkonfirmasi
A. beda = 6
b. U1 = 26 U15 =110 (jadi, U1 + U15 = 136)
c. U50 = 320 U20 = 140 (jadi, U50 – U20 = 180)
Jawaban Terkonfirmasi
jawab soal a
beda = 32-26
= 6
jawan soal b
a = 26
u1 = 26
u15 = a + (n-1)b
= 26 + (15-1) 6
= 26 + 84
= 110
u 1 + u 15 = 26 + 110
= 136
jawan soal c
u50 = 26 + (50-1)6
= 26 + 294
= 320
u20 = 26 + (20-1)6
= 26 + 144
= 140
u 15 -u20 = 320 -140
= 180