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 (d=-1), what will be the degree of ((d+1)x^5+(2d+3)x^2+7)?

Answer and explanation

Correct answer: (2)

The correct answer is B, degree 2. Substitute d=-1 into each coefficient: d+1=-1+1=0, so the x^5 term disappears. Also, 2d+3=2(-1)+3=-2+3=1, so the expression becomes 0x^5+1x^2+7=x^2+7. The highest exponent of x in a non-zero term is 2, so the degree is 2. Option A is wrong because the x^5 coefficient is zero; a zero term is not counted. Option B is correct. Option C is wrong because an x^2 term remains. Option D is wrong because the expression is not constant; it contains x^2. Exam cue: always substitute first, simplify zero coefficients, and then find the highest remaining exponent.

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.