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

What is the recursive rule for the sequence 2, 4, 8, 16, ...?

Answer and explanation

Correct answer: a₁ = 2, aₙ₊₁ = 2aₙ

A recursive rule must state the initial term and explain how to obtain each following term from the preceding one. The sequence starts with a_1=2. Each next value is twice the previous value: 4=2×2, 8=2×4, and 16=2×8. Therefore the recursive rule is a_1=2 and a_(n+1)=2a_n, which is option B. Option A adds 2 and would produce 2, 4, 6, 8 instead. Option C has the correct multiplier but starts with 4, so it describes a different indexed sequence. Option D subtracts 2 and produces decreasing terms. The constant multiplier also shows the related geometric pattern.

Related tags

Recursive RuleGeometric ProgressionSequencesRecursive 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.