समांतर श्रेणी \(12,17,22,27,\ldots\) में \(a_n=72\) के लिए (n) क्या है?

In the arithmetic progression \(12,17,22,27,\ldots\), what is (n) for \(a_n=72\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (13)

Step 1

Concept

(a_n=12+(n-1)5=5n+7), so (5n+7=72) gives (n=13). Form the general term and solve the equation.

Step 2

Why this answer is correct

The correct answer is C. (13). (a_n=12+(n-1)5=5n+7), so (5n+7=72) gives (n=13). Form the general term and solve the equation.

Step 3

Exam Tip

(a_n=12+(n-1)5=5n+7), इसलिए (5n+7=72) से (n=13)। सामान्य पद बनाकर समीकरण हल करें।

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Mathematics Answer, Explanation and Revision Hints

समांतर श्रेणी \(12,17,22,27,\ldots\) में \(a_n=72\) के लिए (n) क्या है? / In the arithmetic progression \(12,17,22,27,\ldots\), what is (n) for \(a_n=72\)?

Correct Answer: C. (13). Explanation: (a_n=12+(n-1)5=5n+7), इसलिए (5n+7=72) से (n=13)। सामान्य पद बनाकर समीकरण हल करें। / (a_n=12+(n-1)5=5n+7), so (5n+7=72) gives (n=13). Form the general term and solve the equation.

Which concept should I revise for this Mathematics MCQ?

(a_n=12+(n-1)5=5n+7), so (5n+7=72) gives (n=13). Form the general term and solve the equation.

What exam hint can help solve this Mathematics question?

(a_n=12+(n-1)5=5n+7), इसलिए (5n+7=72) से (n=13)। सामान्य पद बनाकर समीकरण हल करें।