1. ## difference equations

Write the first 5 terms of each of the following sequences.

$t_{n+2} = t_{n}+t_{n+1}, t_{1}= 3, t_{2}=7, n=1, 2, 3...$

The answers are supposed to be 3,7,10,17,27.

Though why 27?

I've got a test on this today, so please hurry with responses.
any help will be appreciated. please show all working out.

2. Originally Posted by Mr Rayon
Write the first 5 terms of each of the following sequences.

$t_{n+2} = t_{n}+t_{n+1}, t_{1}= 3, t_{2}=7, n=1, 2, 3...$

The answers are supposed to be 3,7,10,17,27.

Though why 27?

I've got a test on this today, so please hurry with responses.
any help will be appreciated. please show all working out.
Why not 27? Please show your working that makes you doubt that 27 is the fifth term.