https://imgur.com/a/oeEBU
Hey guys just some questions in that link, i wrote it on the paper except on c annd d, how do i do that
I'll answer a couple more questions for you
4. It looks like you need to go over sequences. a) If t
n+1=3t
n-4, then you know the value of a term is the 3*(previous term) -4. So t
1=3*t
0-4 = 3*2 -4=6-4 = 2 which is the same as t
0. So every term in the sequence is the same, which is unusual because they often change (for 1 mark I imagine you'd only need to say it's unusual because every term is 2).
b) it's actually the Fibonacci sequence with some different starting terms (but you don't need to know that). You should be able to see from the rule that a term is equal to the previous term + the term before that, ie the sum of the past 2 terms. So the sequence goes 3, 4, 3+4=7, 7+4=11, 11+7=18 etc ie 3,4,7,11,18.
For 6d (depreciation)
Method 1: It starts off at 150000 and decreases by 15% of the original price per year. So decreases by 0.15*150000= 22500 per year
So the value is 150000-22500*n
Method 2: The value reduces by 20% per year. So initial value is 150000, value after a year is 0.8*150000, value after two years is 0.8*0.8*150000. You were on the right track.
Value is initial value * 0.8
n = 0.8
n * 150000