कौन सा कथन हमेशा सत्य नहीं है?
Which statement is not always true?
Explanation opens after your attempt
B. यदि (a<b), तो (-a<-b)If (a<b), then (-a<-b)
Concept
Multiplying (a<b) by (-1) gives (-a>-b). The sign must reverse when multiplying by a negative number.
Why this answer is correct
The correct answer is B. यदि (a<b), तो (-a<-b) / If (a<b), then (-a<-b). Multiplying (a<b) by (-1) gives (-a>-b). The sign must reverse when multiplying by a negative number.
Exam Tip
(a<b) को (-1) से गुणा करने पर (-a>-b) होता है। ऋणात्मक से गुणा करते समय चिन्ह उलटना चाहिए।
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