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

Why is (3x^2+2\sqrt{x}+5) not a polynomial in (x)?

Answer and explanation

Correct answer: Because (\sqrt{x}=x^{\frac{1}{2}})

The direct answer is option B: the expression is not a polynomial because sqrt{x}=x^{1/2} has a fractional power. Start with the rule: in a polynomial in x, the exponent of x in every term must be a non-negative integer such as 0, 1, 2, or 3. Here, 3x^2 is allowed because its exponent is 2; 2sqrt{x}=2x^{1/2} is not allowed because 1/2 is not an integer; and 5 is allowed because a constant has x-power 0. Therefore one invalid term makes the whole expression non-polynomial in x. Option A is wrong: 3x^2 is a valid polynomial term. Option B is correct because it identifies the fractional exponent. Option C is wrong: constants are permitted in polynomials. Option D is wrong: having three terms does not matter; a trinomial can be a polynomial. Memory cue: check exponents, not the number of terms; polynomial powers are 0, 1, 2, 3, and so on.

Related tags

PolynomialSquare RootFractional Power

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.