Q. If f(1)=3 and f(n)=f(n−1)2−5 then find the value of f(3).Answer:
Find f(2): We are given the initial condition f(1)=3 and the recursive formula f(n)=f(n−1)2−5. To find f(3), we first need to find f(2). Using the recursive formula, we substitute n=2 to find f(2): f(2)=f(2−1)2−5f(2)=f(1)2−5f(2)=32−5f(1)=30f(1)=31
Find f(3): Now that we have f(2), we can use it to find f(3). Using the recursive formula again, we substitute n=3 to find f(3): f(3)=f(3−1)2−5f(3)=f(2)2−5f(3)=42−5f(3)=16−5f(3)=11
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