Question

Find next two terms in sequence, identify pattern:

-7, 9, -11, 13, -15 ...

Answer 1

Answer: 17 and -19

Step-by-step explanation:

-7, 9, -11, 13, -15...

Next two terms of 1st difference are : 17 and -19.

Without the operation signs (eg: +,-...) they are going up in two.

It goes negative, then positive and so on.

By using this, I am able to work out the next two terms.