Question
Download Solution PDFयदि एक गुणोत्तर श्रेढ़ी (GP) का प्रथम पद 15 और सार्व अनुपात 4 है, तो इसके 4 पदों का योगफल ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
गुणोत्तर श्रेढ़ी (GP) का प्रथम पद = 15
गुणोत्तर श्रेढ़ी (GP) का सर्वानुपात = 4
प्रयुक्त सूत्र:
\(S_n=a_1\times \dfrac{(r^n-1)}{(r-1)}\)
गणना:
\(S_4=15\times \dfrac{(4^4-1)}{(4-1)}\) \(= \dfrac{15\times 255}{3} = 1275\)
∴ उत्तर 1275 है।
Last updated on Jun 19, 2025
-> The UP Police Sub Inspector 2025 Notification will be released by the end of June 2025 for 4543 vacancies.
-> A total of 35 Lakh applications are expected this year for the UP Police vacancies..
-> The recruitment is also ongoing for 268 vacancies of Sub Inspector (Confidential) under the 2023-24 cycle.
-> The pay Scale for the post ranges from Pay Band 9300 - 34800.
-> Graduates between 21 to 28 years of age are eligible for this post. The selection process includes a written exam, document verification & Physical Standards Test, and computer typing test & stenography test.
-> Assam Police Constable Admit Card 2025 has been released.