f f(x) = 1/(1 + x), then find the value of f[f{f(x)}] at x = 5.
Explanation:
f(5) = 1/(1 + 5) = 1/6
f[f(5)] = f(1/6) = 1/[1 + (1/6)] = 6/7
f[f{f(5)}] = f(6/7) = 1/[1 + (6/7)] = 7/13
Hence, option (b).
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