कौन सा कथन हमेशा सत्य नहीं है?

Which statement is not always true?

Explanation opens after your attempt
Correct Answer

B. यदि (a<b), तो (-a<-b)If (a<b), then (-a<-b)

Step 1

Concept

Multiplying (a<b) by (-1) gives (-a>-b). The sign must reverse when multiplying by a negative number.

Step 2

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.

Step 3

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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Mathematics Answer, Explanation and Revision Hints

कौन सा कथन हमेशा सत्य नहीं है? / Which statement is not always true?

Correct Answer: B. यदि (a<b), तो (-a<-b) / If (a<b), then (-a<-b). Explanation: (a<b) को (-1) से गुणा करने पर (-a>-b) होता है। ऋणात्मक से गुणा करते समय चिन्ह उलटना चाहिए। / Multiplying (a<b) by (-1) gives (-a>-b). The sign must reverse when multiplying by a negative number.

Which concept should I revise for this Mathematics MCQ?

Multiplying (a<b) by (-1) gives (-a>-b). The sign must reverse when multiplying by a negative number.

What exam hint can help solve this Mathematics question?

(a<b) को (-1) से गुणा करने पर (-a>-b) होता है। ऋणात्मक से गुणा करते समय चिन्ह उलटना चाहिए।