Question

f(0) = -5 f(1) = 20 f(n) = -4•f(n-1) - 3•f(n-2); for n > 1

Answer 1

can anyone help me figure out how to work this I got the right answer but I don't remember how I did it

Answer 2

what are you looking for here?

Answer 3

just how to solve the equation again

the sequence is -5, 20, -65, 200, ... Just don't remember how i figured it out

Answer 4

let me rewrite your problem
\(f(0)=-5~~and ~~f(1)=20\) the recursive formula is given by \(f(n)=-4f(n-1)-3f(n-2)) ~~~for ~~n>1\)

Answer 5

so the first two term of this sequence are -5,20
and you said you are looking for how many terms?

Answer 6

is that your concern?

Answer 7

I just can't seem to get the same sequence again

Answer 8

to find the next term you just use that recursive formula
f(2)=-4f(1)-3f(0)=-4(20)-3(-5)=-80+15=-65

Answer 9

I remember now thank you so much for your help

Answer 10

so for f(3)=-4f(2)-3f(1)=-4(-65)-3(20)=....?

Answer 11

No problem!

Answer 12

it makes more sense than what I was doing

Answer 13

what were you doing?

Answer 14

i was trying to plug in the numbers to figure out for 2 and using the solutions like n - (-5)

Answer 15

hmm you went off the hock lol

Answer 16

well you got it now :)

Answer 17

again thank you so much

Answer 18

no problem :)