Question

What is the nth term of this sequence?
1/3, 1/2, 3/5, 2/3, 5/7

A.) n / n-2(n+3)
B.) n / n+2
C.) n / 2n+1
D.) n+2 / N-1

Please help! Thank you<3 xoxo

Answer 1

Heeelp ;~; Pweeeeeezzzz.

Answer 2

you can just plug in the sequence indices to each choice until you get one that matches.
\(a_1=\dfrac{1}{3}\\a_2=\dfrac{1}{2}\\a_3=\dfrac{3}{5}\\....\)

Answer 3

Let me try..

Answer 4

Use the arithmetic rule

Answer 5

r= 1/2 - 1/3 = 3/6 - 2/6 = 1/6
a (first in the sequence) = 1/3
nth term = a + r( n - 1) = 1/3 + 1/6 ( n -1)

Answer 6

Can you do it ? It's hard to do maths on screen.

Answer 7

Waaaah.. ;~: I'm trying

Answer 8

I want to say it's A ... But I'm probably wrong

Answer 9

The arithmetic sequence won't work we don't add the same number each time.

Answer 10

By the way, why don't you use the "dumbs way" ?
Put 1 , 2, 3 ,4
the one which gives you the same numbers as the choices is the right one.

Answer 11

B

Answer 12

It's funny how the "dumbs way" helped me hahaha... Thank you for you assistance, sir SmartyPants. :)) <3

Answer 13

Anytime.

Answer 14

sorry, I couldn't remember the formulas for series/sequences lol

Answer 15

Me too I think it can be solved using

Answer 16

\(\huge \Sigma\)