1cele i think he is asking the question dont be so rude he is new yaar
if α,β are d roots of x2 -x-1 =0 and An = αn +βn then A.M of An-1 and An is ...........
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4 Answers
9a request to new users here
while posting Qs jus mention whether its a doubt from ur side or a challenge for other users here
1
9An-1 + An = An+1 [can be proved ]
let roots be α and -1/α
An+1 = 0 if n is even
if n is odd then its αn+1 + 1/αn+1