UPSC Civil Services Main 2020 Mathematics Paper-I PDF

Central Government Jobs Other Jobs 2020

  • Year 2020
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages Hindi & English

Exam Details

Detail Information
Examination UPSC Civil Services Main Exam
Year 2020
Conducting Body UPSC
Paper Mathematics Paper-I
Subject Mathematics
Duration Three Hours
Maximum Marks 250
Number of Questions 8
Question Type Mixed

This is the Mathematics Paper-I from the UPSC Civil Services Main Examination held in 2020. The paper carries a maximum of 250 marks and is allotted a duration of three hours. It consists of eight questions divided into two sections, with candidates required to attempt five questions in total. Questions 1 and 5 are compulsory, and at least one question must be attempted from each section. This paper is crucial for aspirants aiming to secure a good rank in the Civil Services examination, testing their advanced mathematical knowledge and problem-solving skills.

Major Topics Covered

  • Vector Space
  • Linear Transformation
  • Rank and Nullity
  • Limits
  • Asymptotes
  • Ellipsoid
  • Tangent Plane
  • Integration

Why This Paper is Important

  • Useful for UPSC Civil Services Main Exam preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

  • UPSC Civil Services Main Exam 2020 General Studies Paper-I
  • UPSC Civil Services Main Exam 2020 General Studies Paper-II
  • UPSC Civil Services Main Exam 2020 Mathematics Paper-II
  • UPSC Civil Services Main Exam 2020 Mathematics Paper-I Answer Key
  • UPSC Civil Services Main Exam Mathematics Syllabus
  • UPSC Civil Services Main Exam Pattern
  • UPSC Civil Services Exam
  • UPSC Engineering Services Exam

Instructions

  • इसमें आठ प्रश्न हैं जो दो खण्डों में विभाजित हैं तथा हिन्दी एवं अंग्रेजी दोनों में छपे हैं।
  • उम्मीदवार को कुल पाँच प्रश्नों के उत्तर देने हैं।
  • प्रश्न संख्या 1 और 5 अनिवार्य हैं तथा बाकी प्रश्नों में से प्रत्येक खण्ड से कम-से-कम एक प्रश्न चुनकर तीन प्रश्नों के उत्तर दीजिए।
  • प्रत्येक प्रश्न/भाग के लिए नियत अंक उसके सामने दिए गए हैं।
  • प्रश्नों के उत्तर उसी प्राधिकृत माध्यम में लिखे जाने चाहिए, जिसका उल्लेख आपके प्रवेश-पत्र में किया गया है, और इस माध्यम का स्पष्ट उल्लेख प्रश्न-सह-उत्तर (क्यू० सी० ए०) पुस्तिका के मुखपृष्ठ पर निर्दिष्ट स्थान पर किया जाना चाहिए।
  • प्राधिकृत माध्यम के अतिरिक्त अन्य किसी माध्यम में लिखे गए उत्तर पर कोई अंक नहीं मिलेंगे।
  • यदि आवश्यक हो, तो उपयुक्त आँकड़ों का चयन कीजिए तथा उनको निर्दिष्ट कीजिए।
  • जब तक उल्लिखित न हो, संकेत तथा शब्दावली प्रचलित मानक अर्थों में प्रयुक्त हैं।
  • प्रश्नों के उत्तरों की गणना क्रमानुसार की जाएगी।
  • यदि काटा नहीं हो, तो प्रश्न के उत्तर की गणना की जाएगी चाहे वह उत्तर अंशतः दिया गया हो।
  • प्रश्न-सह-उत्तर पुस्तिका में खाली छोड़ा हुआ पृष्ठ या उसके अंश को स्पष्ट रूप से काटा जाना चाहिए।

  • There are EIGHT questions divided in two Sections and printed both in HINDI and in ENGLISH.
  • Candidate has to attempt FIVE questions in all.
  • Question Nos. 1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing at least ONE question from each Section.
  • The number of marks carried by a question/part is indicated against it.
  • Answers must be written in the medium authorized in the Admission Certificate which must be stated clearly on the cover of this Question-cum-Answer (QCA) Booklet in the space provided.
  • No marks will be given for answers written in a medium other than the authorized one.
  • Assume suitable data, if considered necessary, and indicate the same clearly.
  • Unless and otherwise indicated, symbols and notations carry their usual standard meanings.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.

Questions (page 2)

Section A

Q1.

(a) माना समुच्चय V में सभी n imes n के वास्तविक मैजिक वर्ग हैं। दिखाइए कि समुच्चय V, R पर एक सदिश समष्टि है। दो भिन्न-भिन्न 2 imes 2 मैजिक वर्ग के उदाहरण दीजिए।
Consider the set V of all n imes n real magic squares. Show that V is a vector space over R. Give examples of two distinct 2 imes 2 magic squares.

(b) माना M2(R) सभी 2×2 वास्तविक आव्यूहों का सदिश समष्टि है। माना B = eginvmatrix 1 & -1 \ -4 & 4 endvmatrix. माना Tcolon M2(R) o M2(R) एक रैखिक रूपांतरण है, जो T(A) = BA द्वारा परिभाषित है। T की कोटि (रैंक) व शून्यता (नलिटि) ज्ञात कीजिए। आव्यूह A ज्ञात कीजिए, जो शून्य आव्यूह को प्रतिचित्रित करता है।
Let M2(R) be the vector space of all 2 imes 2 real matrices. Let B = eginvmatrix 1 & -1 \ -4 & 4 endvmatrix. Suppose T: M2(R) o M2(R) is a linear transformation defined by T(A) = BA. Find the rank and nullity of T. Find a matrix A which maps to the null matrix.

(c) lim_{x o racpi4} ( an x)an 2x का मान निकालिए।
Evaluate lim_{x o racpi4} ( an x)an 2x.

(d) वक्र (2x + 3)y = (x-1)2 के सभी अनंतस्पर्शी निकालिए।
Find all the asymptotes of the curve (2x + 3)y = (x-1)2.

(e) दीर्घवृत्तज 2x2 + 6y2 + 3z2 = 27 के स्पर्श समतल का समीकरण निकालिए, जो रेखा x - y - z = 0 = x - y + 2z - 9 से होकर गुजरता है।
Find the equations of the tangent plane to the ellipsoid 2x2 + 6y2 + 3z2 = 27 which passes through the line x-y-z = 0 = x-y + 2z-9.

Section A

Q2.

(a) int01 an-1 left(1 - rac1x
ight) dx का मान निकालिए।
Evaluate int01 an-1left(1-rac1x
ight) dx.

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Frequently asked questions

What is the name of the exam?

The exam is the UPSC Civil Services Main Exam.

What is the year of this question paper?

This question paper is from the year 2020.

Who conducts the Civil Services Main Exam?

The exam is conducted by the Union Public Service Commission (UPSC).

What is the subject of this paper?

This paper is Mathematics Paper-I.

What is the maximum marks for Mathematics Paper-I?

The maximum marks for Mathematics Paper-I is 250.

What is the time allowed for Mathematics Paper-I?

The time allowed for Mathematics Paper-I is Three Hours.

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