समांतर श्रेणी \(15,21,27,33,\ldots\) में \(a_n=87\) के लिए (n) क्या है?

In the arithmetic progression \(15,21,27,33,\ldots\), what is (n) for \(a_n=87\)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

C. (13)

Step 1

Concept

(a_n=15+(n-1)6=6n+9), so (6n+9=87) gives (n=13). Form the general term and solve the equation.

Step 2

Why this answer is correct

The correct answer is C. (13). (a_n=15+(n-1)6=6n+9), so (6n+9=87) gives (n=13). Form the general term and solve the equation.

Step 3

Exam Tip

(a_n=15+(n-1)6=6n+9), इसलिए (6n+9=87) से (n=13)। सामान्य पद बनाकर समीकरण हल करें।

Question me issue ya doubt hai?

Answer, explanation, typing mistake ya suggestion directly hamari team ko bhejein. 📱Helpline (Call / WhatsApp): +91 7272824365

Related Mathematics Questions

FAQs

Mathematics Answer, Explanation and Revision Hints

समांतर श्रेणी \(15,21,27,33,\ldots\) में \(a_n=87\) के लिए (n) क्या है? / In the arithmetic progression \(15,21,27,33,\ldots\), what is (n) for \(a_n=87\)?

Correct Answer: C. (13). Explanation: (a_n=15+(n-1)6=6n+9), इसलिए (6n+9=87) से (n=13)। सामान्य पद बनाकर समीकरण हल करें। / (a_n=15+(n-1)6=6n+9), so (6n+9=87) gives (n=13). Form the general term and solve the equation.

Which concept should I revise for this Mathematics MCQ?

(a_n=15+(n-1)6=6n+9), so (6n+9=87) gives (n=13). Form the general term and solve the equation.

What exam hint can help solve this Mathematics question?

(a_n=15+(n-1)6=6n+9), इसलिए (6n+9=87) से (n=13)। सामान्य पद बनाकर समीकरण हल करें।