diketahui barisan aritmatika 3,7,11,...,95 banyak suku barisan tersebut adalah??

Oleh: USER4142
27 Agustus 2025 matematika 5 menit baca
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Pertanyaan

Grade: Education Mata Pelajaran: matematika
diketahui barisan aritmatika 3,7,11,...,95 banyak suku barisan tersebut adalah??
Ditanyakan oleh:
80 Dilihat 80 Jawaban

Jawaban (80)

Jawaban Terbaik
(230)
a = 3
b = 7-3 = 4

Un = a+(n-1)b
95 = 3+(n-1)4
95 = 3+4n-4
95 = 3-4+4n
95 = -1+4n
95+1 = 4n
96 = 4n
96/4 = n
24 = n

jadi banyak suku barisan tesebut adalah 24
Dijawab pada tanggal 27 Agustus 2025
(147)
a = 3
b = 4
Un = 95
a+(n-1)b = 95
3 + (n-1)(4) = 95
3 +4n-4 = 95
-1 + 4n = 95
4n = 95+1
4n = 96
n = 24
Dijawab pada tanggal 27 Agustus 2025

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