यदि \(a_1=1\) और \(a_{n+1}=a_n+3n\) है तो \(a_4\) क्या होगा?

If \(a_1=1\) and \(a_{n+1}=a_n+3n\), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. (19)

Step 1

Concept

The terms are (1,4,10,19), so \(a_4=19\). Exam tip: (3n) changes at every step.

Step 2

Why this answer is correct

The correct answer is D. (19). The terms are (1,4,10,19), so \(a_4=19\). Exam tip: (3n) changes at every step.

Step 3

Exam Tip

पद (1,4,10,19) हैं इसलिए \(a_4=19\) है। (3n) का मान हर चरण बदलता है।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=1\) और \(a_{n+1}=a_n+3n\) है तो \(a_4\) क्या होगा? / If \(a_1=1\) and \(a_{n+1}=a_n+3n\), what is \(a_4\)?

Correct Answer: D. (19). Explanation: पद (1,4,10,19) हैं इसलिए \(a_4=19\) है। (3n) का मान हर चरण बदलता है। / The terms are (1,4,10,19), so \(a_4=19\). Exam tip: (3n) changes at every step.

Which concept should I revise for this Mathematics MCQ?

The terms are (1,4,10,19), so \(a_4=19\). Exam tip: (3n) changes at every step.

What exam hint can help solve this Mathematics question?

पद (1,4,10,19) हैं इसलिए \(a_4=19\) है। (3n) का मान हर चरण बदलता है।