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 and g(x)=x+1, then what is (f∘g)(x)-(g∘f)(x)?

Answer and explanation

Correct answer: 2x

The governing concept is composition of functions, where (f∘g)(x)=f(g(x)) and (g∘f)(x)=g(f(x)). Function composition is generally not commutative, so the order must be followed carefully. First, (f∘g)(x)=f(x+1)=(x+1)^2=x^2+2x+1. Next, (g∘f)(x)=g(x^2)=x^2+1. Subtracting the second result from the first gives (x^2+2x+1)-(x^2+1)=2x. Therefore option B is correct. Option A misses the coefficient 2, option C gives a different expression rather than the requested difference, and option D incorrectly assumes that both compositions are equal.

Related tags

Function CompositionAlgebra Of FunctionsNoncommutativityRelations And FunctionsAlgebra Of Real 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.