यदि (S_n=\frac{n}{2}[2a+(n-1)d]), (a=9), (d=1), और (n=14) है, तो \(S_n\) का मान क्या है?
If (S_n=\frac{n}{2}[2a+(n-1)d]), (a=9), (d=1), and (n=14), what is the value of \(S_n\)?
Explanation opens after your attempt
A. (217)
Concept
Substituting gives (S_{14}=\frac{14}{2}(18+13)=217). In questions with simple differences, calculate carefully.
Why this answer is correct
The correct answer is A. (217). Substituting gives (S_{14}=\frac{14}{2}(18+13)=217). In questions with simple differences, calculate carefully.
Exam Tip
मान रखने पर (S_{14}=\frac{14}{2}(18+13)=217)। सरल अंतर वाले प्रश्न में गणना ध्यान से करें।
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