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Reil [10]
3 years ago
12

Please help ASAP for the brainliest answer

Mathematics
2 answers:
Wittaler [7]3 years ago
7 0

Answer:

arithmetic sequence

Step-by-step explanation:

The next number is 21

Ronch [10]3 years ago
5 0

Answer:

Triangular Number Sequence

21

Step-by-step explanation:

This sequence is called the Triangular Number Sequence.

To find the next term, add 6 to 15.

The next term in the sequence is 21.

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