What is the domain of (f(x)=\sqrt{\frac{x-1}{x-7}})?फलन (f(x)=\sqrt{\frac{x-1}{x-7}}) का डोमेन क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((-\infty,1]\cup(7,\infty))((-\infty,1]\cup(7,\infty))
The expression inside the square root must satisfy (\frac{x-1}{x-7}\ge0) and (x\ne7). A sign table gives ((-\infty,1]\cup(7,\infty)).वर्गमूल के अंदर (\frac{x-1}{x-7}\ge0) और (x\ne7) चाहिए। संकेत तालिका से ((-\infty,1]\cup(7,\infty)) मिलता है।
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