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On the number line, there is an open dot at (-9), a closed dot at (-1), and the region between them is shaded. Which interval is correct?संख्या रेखा पर (-9) पर खुला बिंदु और (-1) पर बंद बिंदु है तथा बीच का भाग छायांकित है। सही interval कौन-सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((-9,-1])((-9,-1])
The open dot excludes (-9), and the closed dot includes (-1). In exams, use a round bracket for an open endpoint.खुला बिंदु (-9) को बाहर रखता है और बंद बिंदु (-1) को शामिल करता है। परीक्षा में खुले endpoint के लिए गोल कोष्ठक लगाएँ।
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