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

Which statement is correct for (f:A\to B)?

Answer and explanation

Correct answer: For every (x\in A), (f(x)\in B)

The direct answer is A: for every x in A, f(x) belongs to B. The notation f:A→B means that A is the domain, or set of allowed inputs, and B is the codomain, or set in which outputs must lie. Thus, whenever x is chosen from A, its image f(x) must be an element of B. Option A states exactly this defining requirement. Option B reverses the sets: elements of B are not automatically inputs, and f(x) is not thereby required to lie in A. Option C is wrong because the domain may contain many elements; it need not be the empty set. Option D is wrong because the codomain and domain can be different sets, even though some functions happen to use equal sets. For example, if A={1,2} and B={3,4}, a valid function maps each input in A to an output in B. Remember: in f:A→B, arrows go from A to B.

Related tags

FunctionsNotationDomain-Codomain

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.