Question

What is the nth term of the arithmetic sequence?





7, 5, 3, 1, …




A.

–2n


B.

7 – 2n


C.

9 – 2n


D.

n – 2

Answer 1

see the common difference "d" = -2
and first term = 7
\[a _{n} = a _{1} + (n - 1)d\]

Answer 2

plug the values and get a_n

Answer 3

I don't know how, what is a? what is n?

Answer 4

\[a _{n} ~~~is~~~~the~~~~nth~~~term\]

Answer 5

\[a _{1} ~~~~is~~~the~~~~first~~~term\]

Answer 6

u r given \[a_1 = 7\]

Answer 7

yeahhhhhhh still don't get it.

Answer 8

see the given sequence is 7, 5, 3 , 1, ....
the first term i.e \[a_1 = 7\]
and the common difference i.e d = -2

Answer 9

but what is the nth term

Answer 10

nth term i.e \[a_n \]
\[a_n = a_1 + (n - 1)d\]
\[a_n = 7 + (n - 1)()\]

Answer 11

\[a_n = 7 + (n - 1)(-2)\]

Answer 12

B?

Answer 13

nah....:(

Answer 14

A? C? D?

Answer 15

a_n = a + (n - 1)(-2)
a_n = 7 -2n + 2

Answer 16

a_n = 9 - 2n