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 the function \(f(x)=x^2+4x\), what is the expression for \((f+f)(x)\)?

Answer and explanation

Correct answer: \(2x^2+8x\)

By the definition of addition of functions, \((f+f)(x)=f(x)+f(x)=2f(x)\). Hence, \((f+f)(x)=2(x^2+4x)=2x^2+8x\), so option B is correct. In option C, only the \(4x\) term has effectively been doubled, whereas adding two identical functions doubles every term. Exam tip: Rewrite \(f+f\) as \(2f\) before substituting the given function.

Related tags

AlgebraReal FunctionsFunction AdditionRelations 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.