यदि AP में \(a_{2}=9\) और \(a_{5}+a_{8}=72\) है तो \(a_{14}\) क्या होगा?

If in an AP \(a_2=9\) and \(a_5+a_8=72\), what is \(a_{14}\)?

Explanation opens after your attempt
Correct Answer

C. (69)

Step 1

Concept

(a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72), so (d=6). \(a_{14}=9+12d=81\).

Step 2

Why this answer is correct

The correct answer is C. (69). (a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72), so (d=6). \(a_{14}=9+12d=81\).

Step 3

Exam Tip

(a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72) इसलिए (d=6)। \(a_{14}=9+12d=81\)।

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Mathematics Answer, Explanation and Revision Hints

यदि AP में \(a_{2}=9\) और \(a_{5}+a_{8}=72\) है तो \(a_{14}\) क्या होगा? / If in an AP \(a_2=9\) and \(a_5+a_8=72\), what is \(a_{14}\)?

Correct Answer: C. (69). Explanation: (a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72) इसलिए (d=6)। \(a_{14}=9+12d=81\)। / (a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72), so (d=6). \(a_{14}=9+12d=81\).

Which concept should I revise for this Mathematics MCQ?

(a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72), so (d=6). \(a_{14}=9+12d=81\).

What exam hint can help solve this Mathematics question?

(a_5+a_8=\(a_2+3d\)+\(a_2+6d\)=18+9d=72) इसलिए (d=6)। \(a_{14}=9+12d=81\)।