1, 2, 3, ...
Suku Pertama (a) = 1
Beda (b) = 2 - 1 = 1
.
Un = a + (n - 1)b
U40 = 1 + (40 - 1)(1)
U40 = 1 + 39
U40 = 40
Sn = n/2 (a + Un)
S40 = 40/2 (1 + 40)
S40 = 20 (41)
S40 = 820
______
Pelajari soal lainnya
brainly.co.id/tugas/16631131
Mapel: Matematika
Kelas: 9
Materi: baris dan deret
Kata Kunci: -
Kode Soal: 2
Kode Kategorisasi: 9.2.2
____
#backtoschoolcampaign
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1, 2, 3, ...
Suku Pertama (a) = 1
Beda (b) = 2 - 1 = 1
.
Un = a + (n - 1)b
U40 = 1 + (40 - 1)(1)
U40 = 1 + 39
U40 = 40
.
Sn = n/2 (a + Un)
S40 = 40/2 (1 + 40)
S40 = 20 (41)
S40 = 820
______
Pelajari soal lainnya
brainly.co.id/tugas/16631131
______
Mapel: Matematika
Kelas: 9
Materi: baris dan deret
Kata Kunci: -
Kode Soal: 2
Kode Kategorisasi: 9.2.2
____
#backtoschoolcampaign