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

If (u=-2), what is the degree of ((u+2)x^5+(u^2-1)x^4+x)?

Answer and explanation

Correct answer: (4)

To find the degree after assigning a value to a parameter, substitute that value first and simplify the polynomial. The degree is the greatest exponent of the variable whose coefficient is not zero. A term with a zero coefficient disappears completely, so it cannot determine the degree.

Here, with \(u=-2\), the coefficient of \(x^5\) is \(u+2=-2+2=0\), so that term vanishes. The coefficient of \(x^4\) is \(u^2-1=(-2)^2-1=4-1=3\), which is non-zero. The remaining polynomial is \(3x^4+x\). Its highest non-zero exponent is \(4\), so option B is correct. Option A would incorrectly retain the vanished \(x^5\) term.

Related tags

PolynomialParameter SubstitutionDegree

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.