Question

I need help answering questions like this one

a[n]=2 a[n-1]-a[n-2] ; a[1]=4 ; a[2]=3

Answer 1

a[n] is equivalence classes ?

Answer 2

no its a Subscript

Answer 3

this is supposed to be a geometric sequence

Answer 4

Whats the question?

Answer 5

for 3rd term
a[3] = 2*a[3-1] - a[3-2] = 2*a[2] - a[1] = 3 - 4 = -1

Answer 6

@Ignaris to find the other terms of the sequence just replace n with the number of the sequence.
For example for 3:
a[3] = 2*a[3-1] - a[3-2] = 2*a[2] - a[1] = 2*3 - 4 = 6 - 4 = 2
@sangya21 is right, he just made a typo.

Answer 7

Thanks Math&ing001 :)

Answer 8

No probs =)

Answer 9

I kept trying to put in the calculator and got the wrong answer X)

Answer 10

Well you don't really need a calculator for this one =p