ACE MOCK I

Question

Answer 1

a_{n+1 =} $\sqrt{5}$. a_n

OR a_{n+1 =} -$\sqrt{5}$. a_n

Solve both. You will get the answer.

Comments

So factors of the quadratic equation would be root(5)   and -root(5).

Now, its like homogenous solution.

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a(n) = c1.$\sqrt{5}^{n}$ + c2. $(-\sqrt{5})^{n}$