यदि समान्तर श्रेणी में \(a_4=20\) और \(a_9+a_{14}=160\) है तो \(a_{28}\) क्या होगा?

If in an AP \(a_4=20\) and \(a_9+a_{14}=160\), what is \(a_{28}\)?

Explanation opens after your attempt
Correct Answer

B. (176)

Step 1

Concept

(a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160), so (d=8). \(a_{28}=20+24d=212\).

Step 2

Why this answer is correct

The correct answer is B. (176). (a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160), so (d=8). \(a_{28}=20+24d=212\).

Step 3

Exam Tip

(a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160) इसलिए (d=8)। \(a_{28}=20+24d=212\)।

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Mathematics Answer, Explanation and Revision Hints

यदि समान्तर श्रेणी में \(a_4=20\) और \(a_9+a_{14}=160\) है तो \(a_{28}\) क्या होगा? / If in an AP \(a_4=20\) and \(a_9+a_{14}=160\), what is \(a_{28}\)?

Correct Answer: B. (176). Explanation: (a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160) इसलिए (d=8)। \(a_{28}=20+24d=212\)। / (a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160), so (d=8). \(a_{28}=20+24d=212\).

Which concept should I revise for this Mathematics MCQ?

(a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160), so (d=8). \(a_{28}=20+24d=212\).

What exam hint can help solve this Mathematics question?

(a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160) इसलिए (d=8)। \(a_{28}=20+24d=212\)।