Q. If f(1)=1 and f(n+1)=f(n)2+5 then find the value of f(4).Answer:
Given conditions: We are given the initial condition and the recursive formula:f(1)=1f(n+1)=f(n)2+5We need to find f(4). Let's start by finding f(2) using the recursive formula.Substitute n=1 into the recursive formula to find f(2).f(2)=f(1)2+5f(2)=12+5f(2)=1+5f(2)=6
Find f(2): Now that we have f(2), let's find f(3) using the recursive formula.Substitute n=2 into the recursive formula to find f(3).f(3)=f(2)2+5f(3)=62+5f(3)=36+5f(3)=41
Find f(3): Finally, we will find f(4) using the recursive formula.Substitute n=3 into the recursive formula to find f(4).f(4)=f(3)2+5f(4)=412+5f(4)=1681+5f(4)=1686
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