यदि \(a_n=\frac{n^2+n}{2}\) है तो \(a_{18}\) का मान क्या होगा?

If \(a_n=\frac{n^2+n}{2}\), what will be the value of \(a_{18}\)?

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

B. (171)

Step 1

Concept

\(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\). Exam tip: simplify the numerator first in fractions.

Step 2

Why this answer is correct

The correct answer is B. (171). \(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\). Exam tip: simplify the numerator first in fractions.

Step 3

Exam Tip

\(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\) है। भिन्न में पहले अंश सरल 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

यदि \(a_n=\frac{n^2+n}{2}\) है तो \(a_{18}\) का मान क्या होगा? / If \(a_n=\frac{n^2+n}{2}\), what will be the value of \(a_{18}\)?

Correct Answer: B. (171). Explanation: \(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\) है। भिन्न में पहले अंश सरल करें। / \(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\). Exam tip: simplify the numerator first in fractions.

Which concept should I revise for this Mathematics MCQ?

\(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\). Exam tip: simplify the numerator first in fractions.

What exam hint can help solve this Mathematics question?

\(a_{18}=\frac{18^2+18}{2}=\frac{342}{2}=171\) है। भिन्न में पहले अंश सरल करें।