-5, 10, -15, 20,...

Determine the rule for the pattern and then write the next 2 terms of the sequence
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2 Answers

Terms are successive multiples of 5. 1st, 3rd, 5th, (odd terms) are negated and even terms are simple multiples:

-5, 10, -15, 20, -25, 30. The formula for the nth term is (-1)ⁿ(5n).

by Top Rated User (1.2m points)
(-1)ⁿ(5n)

That's another good answer
by Level 3 User (2.6k points)

-25

Sequence = n * (n % 2 == 0 ? 5 : -5)

by Level 3 User (2.6k points)

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