Question

Need help with this ASAP

Answer 1

7) is not an arithmetic sequence...

9)
`0.5 \cdot 4^x`

10)
`-0.25 \cdot (-8)^x`

Explanation:

7 is not an arithmetic sequence because consecutive terms of the sequence do not have a constant common difference.

9 has a first term of 0.5 and has a common ratio of 4 (the quotient between the second term and first, then third term and second, etc.). Thus, your equation is
`0.5 \cdot 4^x`

10 has a first term of -0.25 and has a common ratio of -8 (the quotient between the second term and first, then third term and second, etc.). Thus, your equation is
`-0.25 \cdot (-8)^x`