term to term rule of 1, 3, 6, 10
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Answered by
2
Answer:
This is the Triangular Number Sequence: 1, 3, 6, 10, 15, 21, 28, 36, 45, ... find the next number of the sequence. The first triangle has just one dot.
Answered by
0
Answer:
13
Step-by-step explanation:
because it is the number by 1and 3
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