1.Relation and Function
medium

વિધેય $f(x) = \frac{{{{\sec }^{ - 1}}x}}{{\sqrt {x - [x]} }},$ નો પ્રદેશ મેળવો. ( કે જ્યાં $[.]$ એ મહતમ પૂર્ણાંક વિધેય છે .)

A

$R$

B

$R - \{ ( - 1,\;1) \cup (n|n \in Z)\} $

C

${R^ + } - (0,\;1)$

D

${R^ + } - \{ n|n \in N\} $

Solution

(b) The function ${\sec ^{ – 1}}x$ is defined for all $x \in R – ( – 1,\,\,1)$ and the function $\frac{1}{{\sqrt {x – [x]} }}$ is defined for all $x \in R – Z.$

So the given function is defined for all $x \in R – \{ ( – 1,\,\,1)\,\, \cup \,\,(n\,\,|\,\,n \in Z)\} .$

Standard 12
Mathematics

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