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

If \(f(x)=\frac{1}{x-1}\) and \(g(x)=x+1\), what are the real solutions of \((fg)(x)=1\)?

Answer and explanation

Correct answer: No real solution

Here, \((fg)(x)=f(x)g(x)=\frac{x+1}{x-1}\), with the domain restriction \(x\ne1\). Solving \(\frac{x+1}{x-1}=1\) gives \(x+1=x-1\), which is impossible. Hence, there is no real solution. The choice \(x=1\) is also invalid because \(f(x)\) is undefined there. Exam tip: For an equation containing a fraction, first state that its denominator cannot be zero.

Related tags

Relations-FunctionsAlgebra-Of-FunctionsRational-EquationsDomain-RestrictionAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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.