If

RD Sharma Solutions for Class 11 Maths Chapter 3 – Functions image - 2

Find:

(i) f(\( \dfrac{1}{2}\))

(ii) f(-2)

(iii) f(1)

(iv) \( f (\sqrt{3})\)

(v) \( f (\sqrt{-3})\)

Asked by Sakshi | 1 year ago |  99

1 Answer

Solution :-

(i) f (\( \dfrac{1}{2}\))

When, 0 ≤ x ≤ 1, f(x) = x

f (\( \dfrac{1}{2}\)) = \( \dfrac{1}{2}\)

(ii) f (-2)

When, x < 0, f(x) = x2

f (–2) = (–2)2

= 4

f (–2) = 4

(iii) f (1)

When, x ≥ 1, f (x) = \( \dfrac{1}{x}\)

f (1) = \( \dfrac{1}{1}\)

 f(1) = 1

(iv) \( f(\sqrt{3})\)

We have \( \sqrt{3}\) = 1.732 > 1

When, x ≥ 1, f (x) = \( \dfrac{1}{x}\)

\(f( \sqrt{3})\)\(\dfrac{1}{ \sqrt{3}}\)

(v) \(f(- \sqrt{3})\)

We know \(- \sqrt{3}\) is not a real number and the function f(x) is defined only when x ∈ R.

\(f(- \sqrt{3})\) does not exist.

Answered by Sakshi | 1 year ago

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