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What is the correct number-line interval for ( -15<4-5x\le 0 )?( -15<4-5x\le 0 ) का संख्या रेखा पर सही अंतराल कौन सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ( \left[\frac{4}{5},\frac{19}{5}\right) )( \left[\frac{4}{5},\frac{19}{5}\right) )
Solving gives ( -19<-5x\le -4 ), then signs reverse to ( \frac{19}{5}>x\ge \frac{4}{5} ). In order, write ( \frac{4}{5}\le x<\frac{19}{5} ).हल करने पर ( -19<-5x\le -4 ), फिर चिन्ह पलटकर ( \frac{19}{5}>x\ge \frac{4}{5} ) मिलता है। क्रम में ( \frac{4}{5}\le x<\frac{19}{5} ) लिखें।
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