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

What does the interval (-∞,1] ∩ [1,∞) represent on the number line?

Answer and explanation

Correct answer: {1}

The governing concept is intersection, which consists only of numbers common to both sets. The interval (-∞,1] contains every real number less than or equal to 1, so it includes 1. The interval [1,∞) contains every real number greater than or equal to 1, and it also includes 1. A number smaller than 1 fails to belong to the second interval, while a number greater than 1 fails to belong to the first. Consequently, the only common number is 1. The intersection is therefore the singleton set {1}, represented by one closed point at 1 on the number line. Option A is correct; the other choices either include too many points or incorrectly claim that no point is common.

Related tags

Linear-InequalitiesIntersectionSingleton-SetNumber-LineRepresentation On Number LineLinear InequalitiesMathematicsClass 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.