Q. If f(1)=4 and f(n)=f(n−1)2−4 then find the value of f(4).Answer:
Given initial condition: We are given the initial condition f(1)=4 and the recursive formula f(n)=f(n−1)2−4. To find f(4), we need to find the values of f(2), f(3), and then f(4) using the recursive formula.
Find f(2): First, let's find f(2) using the given formula and the initial condition f(1)=4. f(2)=f(1)2−4 f(2)=42−4 f(2)=16−4 f(2)=12
Find f(3): Next, we'll find f(3) using the value of f(2) we just calculated.f(3)=f(2)2−4f(3)=122−4f(3)=144−4f(3)=140
Find f(4): Finally, we can find f(4) using the value of f(3). f(4)=f(3)2−4 f(4)=1402−4 f(4)=19600−4 f(4)=19596
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