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 is the simple range of (f(x)=\sqrt{x^2-4x+4})?

Answer and explanation

Correct answer: ( [0,\infty) )

The direct answer is A: [0,∞). First simplify the expression: x^2-4x+4=(x-2)^2, so f(x)=√((x-2)^2)=|x-2|. An absolute value can never be negative. Its smallest value is 0, reached when x=2. As x moves away from 2, |x-2| can become any positive number; for example, choosing x=2+t gives f(x)=t for every t≥0. Therefore the range is [0,∞). Option A is correct because it includes zero and every non-negative real value. Option B, (0,∞), wrongly excludes zero, even though f(2)=0. Option C, [2,∞), wrongly says the minimum is 2; the actual minimum is 0. Option D, all real numbers, is wrong because the square-root output is never negative. Remember that √(u^2)=|u|, not simply u, and an absolute value has a V-shaped graph with lowest point on the x-axis. Exam cue: whenever a square root contains a perfect square, simplify it using an absolute value and then identify the least possible output.

Related tags

Relations-FunctionsRangeRadicalModulus

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.