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At which points does the graph (y=|x^2-9|) touch the (x)-axis?ग्राफ (y=|x^2-9|) (x)-अक्ष को किन बिंदुओं पर छूता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((-3,0)) and ((3,0))((-3,0)) और ((3,0))
(|x^2-9|=0) when (x^2-9=0), so (x=\pm3). In exams, modulus is zero only when the inside expression is zero.(|x^2-9|=0) तब (x^2-9=0) होता है इसलिए (x=\pm3)। परीक्षा में मापांक शून्य तभी होता है जब अंदर की राशि शून्य हो।
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