Question

Correct me please..

Answer 1

There should only be one period at the end of a sentence.

Answer 2

Write a possible explicit formula for the following sequence.
-17,-22,-27,-32 \[a _{n} = ?\]

Answer 3

i got \[a _{n}=-17-5(n-1)\] and i got it marked wrong.

Answer 4

its +1

Answer 5

its supposed to be a formula

Answer 6

Can you figure out if its an Arithmetic or Geometric sequence?

Answer 7

-17,-22,-27,-32

so from -17 to -22 you need to add negative 5 or subtract 5.

from -22 to -27 you need to add negative 5 or subtract 5.

from -27 to -32 you need to add negative 5 or subtract 5.

so that means it is an arithmetic sequence? do u know why?

Answer 8

That is the common difference.

Answer 9

the first term is a1 = -17
the common difference is d

Answer 10

i just need to correct my answers so i can get my dad to show me how so anyone know the correct answer?

Answer 11

Total=-17-5n

for n=0 Total = -17
for n=1 Total = -22
for n=2 Total = -27
for n=3 Total = -32
for n=4 Total = -37
for n=5 Total = -42

Answer 12

so -17-5n

Answer 13

You said your formula was marked wrong. Is my formula correct?
As far as an explicit formula it should be something like
T = -17 -5n

Answer 14

@mattt9 is he correct?

Answer 15

or @Hero

Answer 16

Why are you only looking for answers?

Answer 17

i already failed that question so my dad and me are trying to find the right answer out of curiousity cause we were both wrong

Answer 18

What was your answer? What was your dad's answer?

Answer 19

i got
\[a _{n}=−17−5(n−1)\]
and i got it marked wrong.

Answer 20

What is marking these things wrong?

Answer 21

my teaacher

Answer 22

I think some_someone left.

Answer 23

no hes still on this

Answer 24

Yeah I rechecked - guess he came back.

Answer 25

What formula did you use, if any?

Answer 26

KatieAnn or me?

Answer 27

no we kinda just worked together until we both thought it was right.. i dont remember it /:

Answer 28

well what u got seems to just need some simplifying. try it.

Answer 29

ok?

Answer 30

What did you get?

Answer 31

you cant simplify it more it doesnt make sense if you do

Answer 32

\[a _{n} = a _{1} + (n-1)d\]
\[a _{n} = -17 + (n-1)-5\]
\[a _{n} = -17 - 5n + 5 \]
\[a _{n} = -5n - 12\]

Answer 33

It does.

Answer 34

so an= -5n-12

Answer 35

i want you to verify it. Double check.

Answer 36

ok

Answer 37

thank you (:

Answer 38

@wolf1728 do you have anything else to add? :)

Answer 39

Feel free to.

Answer 40

No - just to restate what I said
T = -17 -5n

The formula -5n-12 doesn't work for n = 0.

Answer 41

Given:
-17,-22,-27,-32

-17 is the first term
-22 is the second term
-27 is the third term
-32 is the fourth term

an = -5n - 12

find the first term based of the formula found.

a(1) = -5(1) - 12
a(1) = -5 - 12
a(1) = -17

{Check} {Correct}

Answer 42

@wolf1728 I would recommend to double check your thoughts.

Answer 43

Well it seems to work for me. But no sense getting into a big discussion over it.

Answer 44

Okay so we're all set?

Answer 45

I guess we are :-)