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 \(f(x)=x^2-5x+6\) and \(g(x)=x-2\) then what is the domain of \(\left(\frac{f}{g}\right)(x)\)?

Answer and explanation

Correct answer: \(\mathbb{R}-{2})\)

The direct answer is option A: \(\mathbb R\setminus\{2\}\). A quotient \((f/g)(x)\) equals \(f(x)/g(x)\), so the denominator must not be zero. Here the original denominator is \(g(x)=x-2\). Set it equal to zero: \(x-2=0\), giving \(x=2\). Therefore every real number is allowed except 2. Although \(f(x)=x^2-5x+6=(x-2)(x-3)\), cancellation may simplify the formula to \(x-3\\) only for values where the original quotient was defined; it cannot restore the missing value \(x=2\). Option A is correct. Option B wrongly excludes 3; the denominator at 3 is 1, so the quotient is defined. Option C excludes both 2 and 3, but 3 is allowed. Option D includes 2, where division by zero occurs. Memory cue: for a quotient, inspect the original denominator before cancelling factors.

Related tags

Relations-FunctionsAlgebra-Real-FunctionsQuotient-Domain-Restriction

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.