संख्या रेखा पर (3) और (9) के बीच का भाग छायांकित है तथा (3) पर खुला और (9) पर खुला बिंदु है। सही interval notation कौन-सा है?
The part between (3) and (9) is shaded on the number line with open dots at both (3) and (9). Which interval notation is correct?
Explanation opens after your attempt
C. ((3,9))
Concept
Both open dots show that both endpoints are excluded. In exams write an open-open segment using round brackets.
Why this answer is correct
The correct answer is C. ((3,9)). Both open dots show that both endpoints are excluded. In exams write an open-open segment using round brackets.
Exam Tip
दोनों खुले बिंदु बताते हैं कि दोनों endpoints शामिल नहीं हैं। परीक्षा में open-open segment को round brackets से लिखें।
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