Answer:
6x+2x
Step-by-step explanation:
9514 1404 393
Answer:
False
Step-by-step explanation:
The terms of a geometric series would have a common ratio. The terms of this series do not. (The differences increase by 1 each time, so it is a quadratic series.)
False, the series is not geometric.
Answer:
55
Step-by-step explanation:
N(2n+6)-(n²-1)= 2n²+6n-n²+1=n²+6n+1