Team 1
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Team 2
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Teams
Name
Score
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20
×
Jumlah 5 suku pertama dari pola: 2, 6, 18, …
a=2, r=3, n=5, S5 = 2 × (3^5 - 1)/(3 - 1) = 242
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seesaw
Swap points!
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×
gift
Win 20 points!
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fairy
Take points!
5
10
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25
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banana
Go to last place!
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10
×
Tentukan rasio pola ini: 2, 6, 18, 54, …
Rasio = suku berikut ÷ suku sebelumnya = 6 ÷ 2 = 3
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25
×
Lapangan kursi: baris 1=20, baris 2=25, baris 3=30, … hingga baris 15. Berapa jumlah semua kursi?
a=20, b=5, n=15, U15=90, S15 = (15/2) × (20 + 90) = 825
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25
×
Suku pertama = 15, beda = 7, berapa jumlah 20 suku pertama?
U20 = 15 + (20-1)×7 = 148, S20 = (20/2) × (15 + 148) = 1630
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20
×
Pola: 5, 15, 45, … Tentukan suku ke-5.
Rasio 3, U5 = 5 × 3^4 = 5 × 81 = 405
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thief
Give points!
5
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25
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rocket
Go to first place!
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rocket
Go to first place!
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lifesaver
Give 5 points!
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10
×
Baris 1 ada 3 kursi, baris 2 ada 6 kursi, baris 3 ada 9 kursi. Jika pola berlanjut, berapa kursi di baris ke-5?
Beda tetap 3, U5 = 3 + (5-1)×3 = 15
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10
×
Diketahui pola barisan bilangan: 4, 7, 10, 13, … Tentukan suku ke-6.
Beda tetap = 3, Un = a + (n-1)b → U6 = 4 + (6-1)×3 = 19
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25
×
Suku ke-1 = 12, beda = –4. Tentukan suku ke-15.
U15 = 12 + (15-1)×(-4) = -44
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20
×
Susunan segitiga kecil: baris 1 = 1, baris 2 = 3, baris 3 = 6, baris 4 = 10. Berapa jumlah segitiga di baris ke-7?
Pola segitiga: Un = n(n+1)/2, U7 = 7×8/2 = 28
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25
×
Pola: 81, 27, 9, … Tentukan suku ke-8.
Rasio = 1/3, U8 = 81 × (1/3)^7 = 1/27
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20
×
Jumlah 10 suku pertama dari pola: 4, 7, 10, 13, …
U10 = 4 + (10-1)×3 = 31, S10 = (10/2) × (4 + 31) = 175
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20
×
Suku pertama = 8, beda = 5. Tentukan suku ke-12.
U12 = 8 + (12-1)×5 = 8 + 55 = 63
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×
baam
Lose 25 points!
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star
Double points!
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fairy
Take points!
5
10
15
20
25
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thief
Give points!
5
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25
25
×
Pola: 4, 12, 36, … Berapa jumlah 6 suku pertama?
a=4, r=3, n=6, S6 = 4 × (3^6 - 1)/(3 - 1) = 1456
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