Could you explain the function:
F(n) = n2 + 2n
Is it 2n + 2n Or:
Or something else?
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 + 2n
I guessed at answer 4, so could do with some help if I got it wrong.
Hello,
Ok for this.
No it's not.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 + 2n
I guessed at answer 4, so could do with some help if I got it wrong.
Note that your sequence is
What's in brackets is equal to as sum of the first n consecutive numbers.
Hence