Question

What are the explicit equation and domain for an arithmetic sequence with a first term of 5 and a second term of 2?

Answer 1

\[a _{n}=5-2(n-1);all integers where n\[\ge 1\]
\[a _{n}=5-2(n-1); all integers where n\[\ge 0\]
\[a _{n}=5-3(n-1); all integers where n\[\ge 1\]
\[a _{n}=5-3(n-1); all integers where n\[\ge 0\]

Answer 2

@Hero

Answer 3

an = a1 + (n-1)d , a1 is the 1st term, d is the common difference .
substitute in

Answer 4

So the answer would be A ? @Jim766

Answer 5

the difference between the first term (5) and the 2nd (2) is negative 3

Answer 6

an = 5 + (n-1)(-3)

Answer 7

all they do then is move the neg 3 to the other side of the parenthese

Answer 8

an = 5 -3(n -1)

Answer 9

Right, so how do we get the other part of the answer?

Answer 10

n is the number of the term you need to find...
it is not possible to have a zeroth term

x >= 1

Answer 11

Alright cool, thank you for helping me out.

Answer 12

CCCCCC is WRONG

Answer 13

Who is CCCCCC? @Jasmine32012

Answer 14

what was the correct answer?