Question

can you help me on this questiom? What is the sum of a 30-term arithmetic sequence where the first term is 71 and the last term is -103?

Answer 1

seems straightforward... \[\Large S_n = \frac{n(A_1 + A_n)}{2}\] you know what those letters mean right?

Answer 2

not really lol

Answer 3

Sn means the sum of the series (this is what you're looking for)
A1 means first term
An is the last term
n is the number of terms

now...just substitute accordingly

Answer 4

ok thanks Igbasallote :)

Answer 5

\[\LARGE \color{maroon}{\text{<tips hat>}}\]

Answer 6

is that the whole question? theres no choices or atleast another hint?

Answer 7

here is the whole question: What is the sum of a 30-term arithmetic sequence where the first term is 71 and the last term is -103?

Answer 8

here are the choices: A) -480
B) -448
C) -416
D) -384

Answer 9

n(a1 + An) / 2 thats all i cn gve yu.

Answer 10

ok thanks :D

Answer 11

n=30
a1= first term
an = last term

Answer 12

so 30 is n and a1 is 71and an is -103?

Answer 13

yes answer is-480

Answer 14

ok thank you so much:D

Answer 15

n is always the number of the term it gives you so 30
a1 is the first term of the sequence
an means last of the sequence
and it goes from there :D

Answer 16

thanks:)