Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What is the domain of the function \(f(x)=\frac{x}{x^2+1}\)?

Answer and explanation

Correct answer: \(\mathbb{R}\)

For a rational function, the denominator must not be zero. Here the denominator is \(x^2+1\). Since \(x^2\geq 0\) for every real \(x\), we have \(x^2+1\geq 1\), so it can never be zero. Therefore, the function is defined for every real number and its domain is \(\mathbb{R}\). The closest distractor is B, but at \(x=0\) the denominator equals \(1\), so zero must not be excluded. Exam tip: To find the domain, reject only those values that make the denominator zero.

Related tags

DomainRational FunctionsReal Valued FunctionsRelations And FunctionsClass 11Their Domain And RangeReal Valued Functions Their Domain And RangeMathematics

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.