Q. If f(1)=2 and f(n+1)=f(n)2+5 then find the value of f(4).Answer:
Given initial condition: We are given the initial condition and the recursive formula for the function f:f(1)=2f(n+1)=f(n)2+5We need to find the value of f(4). We will start by finding f(2) using the given recursive formula.Substitute n=1 into the recursive formula to find f(2).f(2)=f(1)2+5f(2)=22+5f(2)=4+5f(2)=9
Find f(2): Now that we have f(2), we will use it to find f(3).Substitute n=2 into the recursive formula to find f(3).f(3)=f(2)2+5f(3)=92+5f(3)=81+5f(3)=86
Find f(3): With f(3) found, we can now find f(4). Substitute n=3 into the recursive formula to find f(4). f(4)=f(3)2+5f(4)=862+5f(4)=7396+5f(4)=7401
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