1.

Let a1=a2=1, a3= 2 and an=an-1+an-2 for n>= 3. If the given sequence is a Fibonacci sequence, then prove using induction that :- a1+a2+......+an= an+2 -1

Answer»
Let a1=a2=1, a3= 2 and an=an-1+an-2 for n>= 3. If the given sequence is a Fibonacci sequence, then prove using induction that :-
a1+a2+......+an= an+2 -1


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