a1 = 3,ak+1 =ak− 2

What is the value of the 4th term? (Select one.)

-9

-5

-3

1

43

I selected -3 for this. I am pretty sure about this.

F(n) = 2 + 4 + 6 +...+ 2n

Which expression below represents the given function? (Select one.)

F(n) =n(n+ 1)

F(n) = (n− 1)(n+ 1)

F(n) =n(n− 1)

F(n) = 2n(2n+ 1)

F(n) =n2 + 2nI guessed at answer 4, so could do with some help if I got it wrong.