यदि गुणोत्तर श्रेढ़ी में \(a_2+a_4=170\) और (r=2) है, तो पहला पद \(a_1\) क्या होगा?

If in a geometric progression \(a_2+a_4=170\) and (r=2), what will be the first term \(a_1\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (17)

Step 1

Concept

\(a_2=2a_1\) and \(a_4=8a_1\), so \(10a_1=170\) and \(a_1=17\). First write the sum using \(a_1\) and (r).

Step 2

Why this answer is correct

The correct answer is C. (17). \(a_2=2a_1\) and \(a_4=8a_1\), so \(10a_1=170\) and \(a_1=17\). First write the sum using \(a_1\) and (r).

Step 3

Exam Tip

\(a_2=2a_1\) और \(a_4=8a_1\), इसलिए \(10a_1=170\) और \(a_1=17\)। योग को पहले \(a_1\) और (r) से लिखें।

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Mathematics Answer, Explanation and Revision Hints

यदि गुणोत्तर श्रेढ़ी में \(a_2+a_4=170\) और (r=2) है, तो पहला पद \(a_1\) क्या होगा? / If in a geometric progression \(a_2+a_4=170\) and (r=2), what will be the first term \(a_1\)?

Correct Answer: C. (17). Explanation: \(a_2=2a_1\) और \(a_4=8a_1\), इसलिए \(10a_1=170\) और \(a_1=17\)। योग को पहले \(a_1\) और (r) से लिखें। / \(a_2=2a_1\) and \(a_4=8a_1\), so \(10a_1=170\) and \(a_1=17\). First write the sum using \(a_1\) and (r).

Which concept should I revise for this Mathematics MCQ?

\(a_2=2a_1\) and \(a_4=8a_1\), so \(10a_1=170\) and \(a_1=17\). First write the sum using \(a_1\) and (r).

What exam hint can help solve this Mathematics question?

\(a_2=2a_1\) और \(a_4=8a_1\), इसलिए \(10a_1=170\) और \(a_1=17\)। योग को पहले \(a_1\) और (r) से लिखें।