समांतर श्रेणी \(64,57,50,43,\ldots\) में (8) कौन-सा पद है?

In the arithmetic progression \(64,57,50,43,\ldots\), which term is (8)?

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Correct Answer

B. (9)वाँ(9)th

Step 1

Concept

From (64+(n-1)(-7)=8), (7(n-1)=56) and (n=9). The same \(a_n\) formula works in a decreasing progression.

Step 2

Why this answer is correct

The correct answer is B. (9)वाँ / (9)th. From (64+(n-1)(-7)=8), (7(n-1)=56) and (n=9). The same \(a_n\) formula works in a decreasing progression.

Step 3

Exam Tip

(64+(n-1)(-7)=8) से (7(n-1)=56) और (n=9)। घटती श्रेणी में भी वही \(a_n\) सूत्र लगता है।

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Mathematics Answer, Explanation and Revision Hints

समांतर श्रेणी \(64,57,50,43,\ldots\) में (8) कौन-सा पद है? / In the arithmetic progression \(64,57,50,43,\ldots\), which term is (8)?

Correct Answer: B. (9)वाँ / (9)th. Explanation: (64+(n-1)(-7)=8) से (7(n-1)=56) और (n=9)। घटती श्रेणी में भी वही \(a_n\) सूत्र लगता है। / From (64+(n-1)(-7)=8), (7(n-1)=56) and (n=9). The same \(a_n\) formula works in a decreasing progression.

Which concept should I revise for this Mathematics MCQ?

From (64+(n-1)(-7)=8), (7(n-1)=56) and (n=9). The same \(a_n\) formula works in a decreasing progression.

What exam hint can help solve this Mathematics question?

(64+(n-1)(-7)=8) से (7(n-1)=56) और (n=9)। घटती श्रेणी में भी वही \(a_n\) सूत्र लगता है।