अनुक्रम \(20,15,7,-8,\ldots\) के लिए कौन सा पुनरावर्ती नियम सही है?

Which recursive rule is correct for the sequence \(20,15,7,-8,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (a_1=20, a_{n+1}=a_n-(3n+2))

Step 1

Concept

The subtractions are (5,8,11), so (3n+2) is subtracted. Exam tip: match both the first term and the subtraction pattern.

Step 2

Why this answer is correct

The correct answer is A. (a_1=20, a_{n+1}=a_n-(3n+2)). The subtractions are (5,8,11), so (3n+2) is subtracted. Exam tip: match both the first term and the subtraction pattern.

Step 3

Exam Tip

घटाव (5,8,11) हैं इसलिए (3n+2) घटता है। पहला पद और घटाव दोनों मिलाने चाहिए।

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FAQs

Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(20,15,7,-8,\ldots\) के लिए कौन सा पुनरावर्ती नियम सही है? / Which recursive rule is correct for the sequence \(20,15,7,-8,\ldots\)?

Correct Answer: A. (a_1=20, a_{n+1}=a_n-(3n+2)). Explanation: घटाव (5,8,11) हैं इसलिए (3n+2) घटता है। पहला पद और घटाव दोनों मिलाने चाहिए। / The subtractions are (5,8,11), so (3n+2) is subtracted. Exam tip: match both the first term and the subtraction pattern.

Which concept should I revise for this Mathematics MCQ?

The subtractions are (5,8,11), so (3n+2) is subtracted. Exam tip: match both the first term and the subtraction pattern.

What exam hint can help solve this Mathematics question?

घटाव (5,8,11) हैं इसलिए (3n+2) घटता है। पहला पद और घटाव दोनों मिलाने चाहिए।