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 (r=2), what will be the degree of ((r^2-4)x^5+(r-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 completely. The degree is the greatest exponent of x whose coefficient is not zero. A term with a zero coefficient disappears and must not be counted, even if it originally has a high power.

With \\(r=2\\), the coefficient of \\(x^5\\) is \\(r^2-4=2^2-4=0\\), so that term vanishes. The coefficient of \\(x^4\\) is \\(r-1=2-1=1\\), leaving the polynomial \\(x^4+x\\). Its highest non-zero exponent is 4. Therefore option B is correct. The original power 5 cannot determine the degree after its coefficient becomes zero.

Related tags

PolynomialDegreeParameter Substitution

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.