Question

What is the nth term of the sequence?





4, –1, –6, –11, …




A.

5n – 9


B.

n + 3


C.

–5n + 9


D.

–5n + 4

Answer 1

a_1 = 4
d = -5
plug it in tht equation

Answer 2

can u give me the equation

Answer 3

also keep in mind the CoC, in regards to tests

Answer 4

if you're taking a test, you should know better

Answer 5

http://openstudy.com/code-of-conduct <--- CoC

Answer 6

ok

Answer 7

Im just asking for help. jeez.

Answer 8

\[a_n = a_1 + (n - 1)\]

Answer 9

let n be the term number, so term 1 term 2 term 3

you know that it is decreasing by 5 so we write the 5 times table but it is decreasing so we make them all negative
and then write the sequence underneath


to get from n to the number in the 5 times tables we multiply by -5 for example

n=1
to get from 1 to -5 we multiply by -5

compare -5 and the first term 4
what is the difference?
4--5=4+5=9
the difference is 9

do the same for n=2
to get from 2 to -10 we multiply by -5
compare -10 and -1
the difference is 9

so we are multiplying n by -5, and then adding on 9

you can write the equation yourself to make sure you understand