solve reccurrence

Question

solve :       $a_{n} - 2a_{n-1 } = 3\times 2^n$ 

provide your approach thanks :)

Comments

Yes, I too got what @hs got. with base condition T(n) = 1 if n = 0. Answer may vary base condition to base condition.

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see this,

and yes answer will change with change in base condition.

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nice thnks @nitish