अनुक्रम \(1,3,7,15,31,\ldots\) में कौन सा पद (127) है?

In the sequence \(1,3,7,15,31,\ldots\), which term is (127)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. (7)वाँ(7)th

Step 1

Concept

This sequence is \(2^n-1\), and \(2^7-1=127\). Exam tip: recognizing powers of (2) is useful.

Step 2

Why this answer is correct

The correct answer is D. (7)वाँ / (7)th. This sequence is \(2^n-1\), and \(2^7-1=127\). Exam tip: recognizing powers of (2) is useful.

Step 3

Exam Tip

यह अनुक्रम \(2^n-1\) है और \(2^7-1=127\) है। (2) की घातों को पहचानना उपयोगी है।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(1,3,7,15,31,\ldots\) में कौन सा पद (127) है? / In the sequence \(1,3,7,15,31,\ldots\), which term is (127)?

Correct Answer: D. (7)वाँ / (7)th. Explanation: यह अनुक्रम \(2^n-1\) है और \(2^7-1=127\) है। (2) की घातों को पहचानना उपयोगी है। / This sequence is \(2^n-1\), and \(2^7-1=127\). Exam tip: recognizing powers of (2) is useful.

Which concept should I revise for this Mathematics MCQ?

This sequence is \(2^n-1\), and \(2^7-1=127\). Exam tip: recognizing powers of (2) is useful.

What exam hint can help solve this Mathematics question?

यह अनुक्रम \(2^n-1\) है और \(2^7-1=127\) है। (2) की घातों को पहचानना उपयोगी है।