यदि (r<s) है तो (7-2r) और (7-2s) के बीच सही संबंध क्या है?
If (r<s), what is the correct relation between (7-2r) and (7-2s)?
Explanation opens after your attempt
B. (7-2r>7-2s)
Concept
Multiplying (r<s) by (-2) reverses the sign to (-2r>-2s), and adding (7) keeps the direction. Check the sign at every step in mixed transformations.
Why this answer is correct
The correct answer is B. (7-2r>7-2s). Multiplying (r<s) by (-2) reverses the sign to (-2r>-2s), and adding (7) keeps the direction. Check the sign at every step in mixed transformations.
Exam Tip
(r<s) को (-2) से गुणा करने पर चिन्ह उलटकर (-2r>-2s) होता है फिर (7) जोड़ने से दिशा वही रहती है। मिश्रित रूपांतरण में हर चरण का चिन्ह जाँचें।
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