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

Let \(a\) be an irrational number and \(r\) be a non-zero rational number. Which of the following statements is always true?

Answer and explanation

Correct answer: The sum \(a+r\) is irrational

If \(a+r\) were rational, then \(a=(a+r)-r\) would also be rational, contradicting that \(a\) is irrational. Hence the sum is irrational. Exam tip: adding or subtracting a rational number preserves irrationality.

Related tags

Irrational NumbersRational NumbersNumber SystemsProperties Of NumbersProof By ContradictionMathematicsClass 9 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.