Question

The 13th term of an arithmatic sequence is 69. The common difference is 7. What is the first term of the sequence?

Answer 1

69-12(7)

Answer 2

show your work please?

Answer 3

An = A1 + (n-1)d

you're looking for A1..you're given a certain value in the sequence which is A13 = 69..so n=13

d = 7

can you substitute these values to the variables in the equation?

Answer 4

that was the work .... its just the sequence in reverse right?

Answer 5

if the first terms is 69 and the common diff is -7, what is the 13th term? :)