यदि समानांतर श्रेढ़ी में \(a_2=9\) और \(a_8=39\) है, तो \(a_5\) क्या होगा?

If an arithmetic progression has \(a_2=9\) and \(a_8=39\), what is \(a_5\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (24)

Step 1

Concept

From \(a_2\) to \(a_8\), the increase over (6) gaps is (30), so (d=5), hence (a_5=9+3(5)=24). Find the common difference first.

Step 2

Why this answer is correct

The correct answer is C. (24). From \(a_2\) to \(a_8\), the increase over (6) gaps is (30), so (d=5), hence (a_5=9+3(5)=24). Find the common difference first.

Step 3

Exam Tip

\(a_2\) से \(a_8\) तक (6) अंतर में वृद्धि (30) है इसलिए (d=5), अतः (a_5=9+3(5)=24)। पहले समान अंतर निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि समानांतर श्रेढ़ी में \(a_2=9\) और \(a_8=39\) है, तो \(a_5\) क्या होगा? / If an arithmetic progression has \(a_2=9\) and \(a_8=39\), what is \(a_5\)?

Correct Answer: C. (24). Explanation: \(a_2\) से \(a_8\) तक (6) अंतर में वृद्धि (30) है इसलिए (d=5), अतः (a_5=9+3(5)=24)। पहले समान अंतर निकालें। / From \(a_2\) to \(a_8\), the increase over (6) gaps is (30), so (d=5), hence (a_5=9+3(5)=24). Find the common difference first.

Which concept should I revise for this Mathematics MCQ?

From \(a_2\) to \(a_8\), the increase over (6) gaps is (30), so (d=5), hence (a_5=9+3(5)=24). Find the common difference first.

What exam hint can help solve this Mathematics question?

\(a_2\) से \(a_8\) तक (6) अंतर में वृद्धि (30) है इसलिए (d=5), अतः (a_5=9+3(5)=24)। पहले समान अंतर निकालें।