Question

PLEASE HELP I AM STUCK !!!!!!!!!!!!!! Which of the following equations best represents the graph of f(n)

If f(x) = 7x - 1, what does f(12) represent

Answer 1

To find f(12), replace every x with 12 and evaluate.

Answer 2

i dont get it.

Answer 3

f(x) = 7x - 1

f(12) = 7*12 - 1 ... replace every x with 12

now evaluate

Answer 4

f(x)=83?

Answer 5

good

Answer 6

f(12) = 83 actually

Answer 7

but you got it pretty much

Answer 8

oh ok thank you. well you help me on others ?

Answer 9

I can help with one more

Answer 10

The first five terms of a sequence are shown below:

5, 9, 13, 17, 21

If the nth term of this sequence is represented by f(n), which of the following functions best represents this sequence?

Answer 11

what do you notice about the jump from 5 to 9? From 9 to 13? etc etc

Answer 12

a. f(n) = 5n - 1; n ≥ 1
b. f(n) = 5n + 1; n ≥ 1
c.f(n) = 4n - 1; n ≥ 1
d. f(n) = 4n + 1; n ≥ 1

Answer 13

it goes by 4

Answer 14

so that's the common difference

Answer 15

which means d = 4

Answer 16

the starting term is 5, so a1 = 5

Answer 17

nth term:

an = a1 + d(n-1)

an = 5 + 4(n-1)

an = 5 + 4n-4

an = 4n + 1

this is where n is an integer and it starts at n = 1

Answer 18

The formula an = a1 + d(n-1) is the general arithmetic sequence (the nth term of it)

Answer 19

a1 is the first term
d is the common difference (telling you how much to increase each term each time)

Answer 20

so it would be f(n)=4+1 n_>1

Answer 21

correct

Answer 22

thank you and for the first question, its not what does f(12) euqals its what it represents.....

Answer 23

it's the y value or output of the function when the input is x = 12

Answer 24

a. The value of x when (7x - 1) = 12
b. The value of (7x - 1) when x = 12
c.The value of 12 f(x) when x = 12
d.The value of f(x) when (7x - 1) = 12
i think its b

Answer 25

in goes x = 12, out comes y = 83

Answer 26

b is correct

Answer 27

thank you so much ! its clear now.

Answer 28

you're welcome