Asked by No one special

So, this "kiddo" needs some help plz!

You are having a discussion about sequences with your classmate. She insists that the sequence is 2, 3, 5, 8, and 12 must be either arithmetic or geometric. Is she correct. Explain.

HELP I DO NOT UNDERSTAND THIS!!!!! D;
Answered by Ms. Sue
Each number increases by one more than the preceding interval.

2 + 1 = 3
3 + 2 = 5
5 + 3 = 8
8 + 4 = 12
Answered by No one special
I see the pattern it's 2+1=3,3+2=5...your adding one more then before. If that makes sense. But otherwise I'm still stumped.
Answered by No one special
Wait..it would be arithmetic right?
Answered by Damon
3 = 2*1.5
5 = 3 *1.666666 .....
1.5 is not 1.6666..
so it is not geometric

3-2 = 1
5-3 = 2 so it is not arithmetic
Answered by No one special
She's incorrect. 2,3,5,8,and 12 is not arithmetic because there is no formula. (add two repeatedly) It cannot be geometric either and we know that because most geometric sequences are things like fractions and negatives. ( -4 subtract 1 repeatedly)
Answered by Ms. Sue
That's what Damon posted.

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