Question

Prove 2^n-1 = a_(n-1)+n

Answer 1

n is natural?

Answer 2

and are you doing induction in class?

Answer 3

@zzr0ck3r yes

Answer 4

what is a_(n-1)+n?

Answer 5

(n-1)(n-1+1)n @zzr0ck3r

Answer 6

im confused, why would anyone write it like that -1+1

post the entire question as it was given to you.

Answer 7

this is all = n^3-n^2

Answer 8

and when n = 1on th LHS you have 2^1-1 = 1 and on the right hand side 1-1 = 0

so this is not true for all n