Solution:
f(x) = \(\frac1x\)
Now, ff(x) = f(f(x)) = f(\(\frac1x\)) [∵ f(x) = \(\frac1x\)]
= \(\frac{1}{\frac1x}\)
= 1 x \(\frac{x}{1}\)
∴ ff(2) = 2 is the required answer
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If f(x) = \(\frac1x\), x ∈ R, x ≠ 0, find the value of ff(2)
Solution:
f(x) = \(\frac1x\)
Now, ff(x) = f(f(x)) = f(\(\frac1x\)) [∵ f(x) = \(\frac1x\)]
= \(\frac{1}{\frac1x}\)
= 1 x \(\frac{x}{1}\)
∴ ff(2) = 2 is the required answer
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