Question

Write a recursive formula for the sequence 7, 13, 19, 25, 31 then find the next term in the sequence?

Answer 1

13-7=6
19-13=6
hence x+6
hence 31+6

Answer 2

well, you know that
\[a _{n}=a _{1}+(n-1)d\]

you can find \[d=a _{2}-a _{1}\]

you know, that
\[a _{1}=7 \]
\[a _{2}=13\]

what is d?

Answer 3

is it: an = an– 1 + 6, where a1 = 7; 37?

Answer 4

I just wanted to make sure the answer I got was right. ^^;;

Answer 5

the answer should be

\[a _{_{n}}=7+6n-6=1+6n\]

when n is a number of member in sequance

Answer 6

no
7+(6-1)n
7+5n
in this case n=6
7+30
37

Answer 7

for example, you need to find \[a _{6}=1+6*6=37\]

Answer 8

My answers have to look like this, that's what confused me.
an = an– 1 + 6, where a1 = 7; 37
an = an– 1 + 6, where a1 = 37; 7
an = an– 1 – 6, where a1 = 6; –23
an = an– 1 – 6, where a1 = 7; –8

Answer 9

It's multiple choice. =/

Answer 10

The first answer is correct

Answer 11

That's what I figured, thanks

Answer 12

for multiple choice questions approach it in the simplest way possible which is the first one both the methods are correct