Question

use summation notation to write the series 2.2 + 8.8 +15.4 + .... for 5 terms.

Answer 1

I got that answer wrong but now im trying to figure out how to get the right answer

Answer 2

@phi

Answer 3

i think it would be 26.4

Answer 4

If you look at the picture, it gives you the right answer. i just want to know how thats the right answer?

Answer 5

ok hold on just one second

Answer 6

ok nevermind thats over my head srry i wasant much help

Answer 7

haha its okay

Answer 8

what grade are you in im only in 6th

Answer 9

9th

Answer 10

algebra 2

Answer 11

o thats why i dont know how to do it then

Answer 12

hahaha yeah that might be why ;)

Answer 13

lol yea

Answer 14

@mathstudent55

Answer 15

hey

Answer 16

what can i help you with

Answer 17

the question above?

Answer 18

IDK

Answer 19

me either. thats why i aksed haha

Answer 20

anything?

Answer 21

If you take the differences of the data points it will be 6.6 and constant throughout. therefore there should be a 6.6n part. Therefore you can rule out the 3rd option.

now take the iteration on each option (n=0 or n=1). The first two options starts with n=0. When substituted -5.4+6.6(0)=-5.4 which is not the first element.

Similarly try for others. hopefully you'll get the answer

Answer 22

thank you!!