अनुक्रम \(25,20,15,10,\ldots\) का (n)वाँ पद कौन-सा है?

What is the (n)th term of the sequence \(25,20,15,10,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (30-5n)

Step 1

Concept

The first term is (25) and the difference is (-5), so (a_n=25+(n-1)(-5)=30-5n). Pay attention to the sign in a decreasing sequence.

Step 2

Why this answer is correct

The correct answer is A. (30-5n). The first term is (25) and the difference is (-5), so (a_n=25+(n-1)(-5)=30-5n). Pay attention to the sign in a decreasing sequence.

Step 3

Exam Tip

पहला पद (25) और अंतर (-5) है, इसलिए (a_n=25+(n-1)(-5)=30-5n)। घटती श्रेढ़ी में चिह्न पर ध्यान दें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(25,20,15,10,\ldots\) का (n)वाँ पद कौन-सा है? / What is the (n)th term of the sequence \(25,20,15,10,\ldots\)?

Correct Answer: A. (30-5n). Explanation: पहला पद (25) और अंतर (-5) है, इसलिए (a_n=25+(n-1)(-5)=30-5n)। घटती श्रेढ़ी में चिह्न पर ध्यान दें। / The first term is (25) and the difference is (-5), so (a_n=25+(n-1)(-5)=30-5n). Pay attention to the sign in a decreasing sequence.

Which concept should I revise for this Mathematics MCQ?

The first term is (25) and the difference is (-5), so (a_n=25+(n-1)(-5)=30-5n). Pay attention to the sign in a decreasing sequence.

What exam hint can help solve this Mathematics question?

पहला पद (25) और अंतर (-5) है, इसलिए (a_n=25+(n-1)(-5)=30-5n)। घटती श्रेढ़ी में चिह्न पर ध्यान दें।