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 (a_n=n^2-3n+5), what is the smallest term value?

Answer and explanation

Correct answer: 3

For positive integer values of n, \(a_n=n^2-3n+5=(n-1)(n-2)+3\). The product \((n-1)(n-2)\) is 0 at n = 1 and n = 2, and it is positive for other positive integers. Hence, the smallest term value is \(3\). Option \(2\) may seem tempting because the quadratic has its real minimum at \(n=\tfrac32\), but a sequence index must be an integer. Exam tip: while finding extrema of a sequence, use only valid integer indices.

Related tags

Sequences And ProgressionsNth TermQuadratic SequenceMinimum TermClass 9 MathematicsMathematicsClass 9 Mcq

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.