Question

When finding the sum of the arithmetic series 4 + 1 + –2 + –5 + –8 + –11, you will have a step of work that contains the number –3. Use complete sentences to describe how the –3 was calculated and what it means.

Answer 1

hint : 1-4 = -3

Answer 2

im confused :(.

Answer 3

ok, subtract 'first term' from the 'second term' and see wat u get

Answer 4

-3

Answer 5

good :)

do this -

subtract '2nd term' from the '3rd term' and see wat u get

Answer 6

-3 again

Answer 7

4th - 3rd

Answer 8

5th - 4th

Answer 9

do them also, and convince urself u get -3

Answer 10

-3 lol

Answer 11

so -3 is the difference between each consecutive term, eh ?

Answer 12

its called 'common difference'

Answer 13

ok so i should put
To get -3 i use the common differnce. I subtract the first from the second term, third from the fourth term, and fourth from the fith term .

Answer 14

you may rephrase it a bit

Answer 15

Now that you knw wat -3 is, look at the question again. It asks you to find the sum of series

Answer 16

To find the sum of series,i use the common differnceto get -3. I subtract the first from the second term, third from the fourth term, and fourth from the fith term .

Answer 17

ha looks okay, do u knw the sum of arithmetic series formula ?

Answer 18

sn=n/2(a1+a2) ?