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 a₁ = 1, a₂ = 4, and aₙ = 2aₙ₋₁, what is a₅?

Answer and explanation

Correct answer: 32

The governing concept is a recursive sequence in which each term from the stated recurrence onward is twice the preceding term. Although a₁ = 1 is supplied, a₂ = 4 is also explicitly given, so use a₂ as the starting point for the recurrence. Calculate a₃ = 2a₂ = 2 × 4 = 8, a₄ = 2a₃ = 16, and a₅ = 2a₄ = 32. Therefore option C is correct. Option A is only a₄, so it stops one step early. The values 24 and 40 do not arise from repeatedly doubling the preceding term. The explicitly stated value a₂ also means there is no need to derive it from a₁.

Related tags

SequencesRecursive-RuleGeometric-PatternTerm-GenerationRecursive RuleSequences And ProgressionsMathematicsClass 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.