Question

I will medal/fan.. NO DIRECT ANSWERS
Identify the type of sequence shown in the table below and select the appropriate response.
n f(n)
1 540
2 500
3 460
4 420
5 380


Arithmetic sequence; common difference is −40
Arithmetic sequence; common difference is 40
Geometric sequence; common ratio is −40
Geometric sequence; common ratio is 40

Answer 1

@DanJS

Answer 2

Do you know what each of those sequences look like?

Answer 3

somewhat?! @DanJS

Answer 4

yes.. okay! @DanJS @Hero

Answer 5

Test if it follows each by using a couple of the points

Answer 6

I am ust not good with the arithmatic stuff like what?

Answer 7

If it increases the same amount for each increase in n, it is arithmetic

Answer 8

or decreases

Answer 9

so Its geometric, I am assuming?

Answer 10

a geometric sequence will have the ratio of any two consecutive terms as a constant same value

Answer 11

http://www.differencebetween.com/difference-between-arithmetic-sequence-and-vs-geometric-sequence/

Answer 12

so the answer is c or d, not a or b.

Answer 13

looks like it is decreasing by 40 for every increase in n

Answer 14

arithmetic, common difference in sucessive terms

Answer 15

okay. so I mean a or b.. I was reading it wrong

Answer 16

so the common difference is -40?

Answer 17

yes, you see you are taking the previous term and adding (-40) to it every time

Answer 18

an = a(n-1) - 40

Answer 19

Can you help with another?

Answer 20

If it were geometric, you can test out the ratio to see, by

\[\frac{ a _{n+1} }{ a _{n} } = r\]

Answer 21

the ratio will be a value for geometric, not the difference

Answer 22

What is the exact value for the expression the square root of 56. − the square root of 14. + the square root of 126.? Simplify if possible.

the square root of 14.
4 the square root of 14.
2 the square root of 42.
8 the square root of 42.

Answer 23

sorry dinners ready... Maybe later, if ur on you could help? ::)

Answer 24

@DanJS I think that the answer is B?