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If f(n+2)=(1)/(2){f(n+1)+(9)/(f(n))}, n ...

If `f(n+2)=(1)/(2){f(n+1)+(9)/(f(n))}, n in N and f(n) gt0` for all ` n in N`, then ` lim_( n to oo)f(n)` is equal to

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