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CBSE Class 11-science Answered

<div>is set A={x:x&gt;3 and x&lt;4} null set? then in your mcq test answer was yes&nbsp;</div> <div>my doubt is that why can't the answer be 3.5 is there any restriction of using fraction as answer?</div> <div>&nbsp;</div>
Asked by anusha bala | 08 Apr, 2015, 09:12: PM
Expert Answer
G i v e n space q u e s t i o n space i s colon I s space t h e space s e t space A equals open curly brackets x colon x less than 3 comma space x greater than 4 close curly brackets space i s space a space n u l l space s e t. H e r e comma space 3.5 greater than 3 space a n d space h e n c e comma space 3.5 not an element of A C o n s i d e r space 2.5 less than 3 comma space b u t space 2.5 not greater-than 4 comma space a n d space 2.5 less than 4 space a n d space h e n c e comma space 2.5 not an element of A. S o comma space t h e r e space i s space n o space apostrophe x apostrophe space f o r space w h i c h space x less than 3 space a n d space x greater than 4 H e n c e space A space i s space a space n u l l space s e t.
Answered by Vimala Ramamurthy | 09 Apr, 2015, 09:08: AM
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