यदि \(f:\mathbb{R}\to\mathbb{R}\) को (f(x)=\frac{1}{x-2-9}) से दिया जाए, तो इसे सही वास्तविक फलन बनाने के लिए प्रांत क्या होना चाहिए?
If \(f:\mathbb{R}\to\mathbb{R}\) is given by (f(x)=\frac{1}{x-2-9}), what should be the domain to make it a valid real function?
Explanation opens after your attempt
B. \(\mathbb{R}-{-3,3}\)
Concept
The denominator needs \(x^2-9\ne0\), so \(x\ne -3,3\). In rational functions never allow the denominator to be zero.
Why this answer is correct
The correct answer is B. \(\mathbb{R}-{-3,3}\). The denominator needs \(x^2-9\ne0\), so \(x\ne -3,3\). In rational functions never allow the denominator to be zero.
Exam Tip
हर में \(x^2-9\ne0\) चाहिए, इसलिए \(x\ne -3,3\)। भिन्न वाले फलनों में हर को शून्य न होने दें।
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