It is given that
a) By first considering the values of , , , and making a conjecture for a formula for , make a conjecture for a formula for Sn.
b) Use induction to prove that your conjecture is correct.
For a) i did
so the conjecture for
so n=1 is true.
what do i do next? or how to i prove
then we try to express P(k+1) in terms of P(k) to find out if there is a cause
Let's see if this is what we get when we add the (k+1)th term to
since the (k+1)th term is
As being valid will cause to be valid,
there is a cause and effect relationship, so you only need test the first one.