Jawaban:
a. 1,3 = Ditambah 2
3,6 = Ditambah 3
Jadi, rumusnya = a
Penjelasan dengan langkah-langkah:
U1 = 1
U2 = 1 + 2 = 3
U3 = 3 + 3 = 6
U4 = 6 + 4 = 10
U5= 10 + 5 = 15
U6 = 15 + 6 = 21
U7 = 21 + 7 = 28
U8 = 28 + 8 = 36
U9 = 36 + 9 = 45
U10 = 45 + 10 = 55
S10 = 1+3+6+10+.....+55 = 220
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Jawaban:
a. 1,3 = Ditambah 2
3,6 = Ditambah 3
Jadi, rumusnya = a
Penjelasan dengan langkah-langkah:
U1 = 1
U2 = 1 + 2 = 3
U3 = 3 + 3 = 6
U4 = 6 + 4 = 10
U5= 10 + 5 = 15
U6 = 15 + 6 = 21
U7 = 21 + 7 = 28
U8 = 28 + 8 = 36
U9 = 36 + 9 = 45
U10 = 45 + 10 = 55
S10 = 1+3+6+10+.....+55 = 220