Question

I Need Help With Functions? Algebra I - Given the sequence of numbers: 5, 6, 8, 11, 15, 20, 26, 33, 41… Explain whether or not this sequence can be considered a function.

Answer 1

This is what I put:

I think this sequence can be a function. I am not sure how to explain this function, though. Hm.

F(n)
F(1) = 5
F(2) = f(1) + 1
F(3) = f(2) + 2
F(4) = f(3) + 3
F(5) = f(4) + 4
And so on and so on?

Answer 2

@ash2326 return and help him. I need to go to bed x_x

Answer 3

I have a feeling I am wrong.

Answer 4

the fact that the differences go up one each time is a good clue that this is a quadratic funcion

Answer 5

Okay, but did I write the distributive formula correctly?

Answer 6

you have it right
but you want to be looking for something like \(f(x)=ax^2+bx+c\)

Answer 7

oooh i see, i didn't read the question carefully
you do not have to actually find the function do you? only say that it is one

Answer 8

in which case you are good with your answer
it is a function because you came up with a recursive rule for it

Answer 9

Thank god. Thank you Mr. @satellite73

Answer 10

yw