यदि \(S_n=6n^2+2n\) है तो इस समान्तर श्रेणी का (a+d) कितना होगा?

If \(S_n=6n^2+2n\), what is (a+d) for this arithmetic progression?

Explanation opens after your attempt
Correct Answer

D. (20)

Step 1

Concept

\(a=S_1=8\) and \(a_2=S_2-S_1=20\), so (d=12) and (a+d=20). Exam tip: find \(S_1\) and \(S_2-S_1\).

Step 2

Why this answer is correct

The correct answer is D. (20). \(a=S_1=8\) and \(a_2=S_2-S_1=20\), so (d=12) and (a+d=20). Exam tip: find \(S_1\) and \(S_2-S_1\).

Step 3

Exam Tip

\(a=S_1=8\) और \(a_2=S_2-S_1=20\) है इसलिए (d=12) और (a+d=20)। परीक्षा में \(S_1\) और \(S_2-S_1\) निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(S_n=6n^2+2n\) है तो इस समान्तर श्रेणी का (a+d) कितना होगा? / If \(S_n=6n^2+2n\), what is (a+d) for this arithmetic progression?

Correct Answer: D. (20). Explanation: \(a=S_1=8\) और \(a_2=S_2-S_1=20\) है इसलिए (d=12) और (a+d=20)। परीक्षा में \(S_1\) और \(S_2-S_1\) निकालें। / \(a=S_1=8\) and \(a_2=S_2-S_1=20\), so (d=12) and (a+d=20). Exam tip: find \(S_1\) and \(S_2-S_1\).

Which concept should I revise for this Mathematics MCQ?

\(a=S_1=8\) and \(a_2=S_2-S_1=20\), so (d=12) and (a+d=20). Exam tip: find \(S_1\) and \(S_2-S_1\).

What exam hint can help solve this Mathematics question?

\(a=S_1=8\) और \(a_2=S_2-S_1=20\) है इसलिए (d=12) और (a+d=20)। परीक्षा में \(S_1\) और \(S_2-S_1\) निकालें।