Question

WILL GIVE MEDAL AND FAN!!!
Graph the first six terms of a sequence where a1 = 3 and d = -10.

Answer 1

This is a geometric sequence where each term is multiplied by -10

if a1 = 3, what is a2?

Answer 2

-0.6?

Answer 3

-6*?

Answer 4

if d = -10 the sequence looks like:\[a_1 = 3 | a_2 = 3*-10\]

Answer 5

so a2 would =-30?

Answer 6

mhm. what would a3 be?

Answer 7

a3=-30*-10? so 300?

Answer 8

correct. only 3 more terms

Answer 9

a4=-3,000?

Answer 10

yep

Answer 11

and a5=30,000?

Answer 12

and a6=-300,000?

Answer 13

Correct. Apparently you have to graph it though

Answer 14

yes i don't know how to do that.

Answer 15

make the x scale go by 1s and the y by 100,000s

Answer 16

"d" is usually used to denote the "common difference" in an arithmetic sequence
"r" is used as the "common ratio" in a geometric sequence

so I would guess that they mean arithmetic sequence here

Answer 17

Oh my, how embarassing.

Answer 18

what?

Answer 19

It's an arithmetic sequence not a geometric sequence

Answer 20

@bibby - np - we all make mistakes - thats what makes us human :)

Answer 21

so does that mean for every point starting at 1,-10 the graph will go down 10 ex: 2,-20 3,-30?

Answer 22

or 1,-7 2,-27 3,-37 and so on?

Answer 23

Correct. Straight down 10 units just that we start at 3
so
3
-13
-23
-33

Answer 24

dont you mean 1,3 2,-7 3,-17 4,-27?

Answer 25

Wow, I must be tired. I can't do basic math anymore :/

Answer 26

you're right

Answer 27

yay!!! thank you both for your help!!!

Answer 28

could you help me with another one?

Answer 29

yw :)

you should post each question separately - it helps other users as well to have each question dealt with on its own

Answer 30

okay