Question

Write the sum using summation notation, assuming the suggested pattern continues.

-10 - 2 + 6 + 14 + ... + 110

Answer 1

hello

Answer 2

hello

Answer 3

do you know the formula for nth term of an arithmetic sequence?

this is one and common difference ix 8

Answer 4

no clue

Answer 5

notice we can write the first term as 8n - 10 where n = 0
the second one would be 8(1) + 10 = -2 and third = 8(2) - 10 = 6


the last term is 8(15) - 10 = 120 - 10 = 110

Answer 6

I believe it would be:
\[\sum_{1}^{n}8n _{i}-18\]

Answer 7

except the bottom should be i=1 rather than 1

Answer 8

yes

Answer 9

thats not one of the answers

Answer 10

and n would be = 16 if it we take 110 to be the last term

Answer 11

What about
\[\sum_{i=0}^{n}8n _{i}-10\]

Answer 12

yes thats how i was going to write it
both are correct

Answer 13

agin maybe n = 15 because last term is 110

Answer 14

Oh he's gone anyway!!

Answer 15

lol, oh well