CS Main 2018 Mathematics Paper-I Question Paper PDF

Central Government Jobs Other Jobs 2018

  • Year 2018
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages Hindi & English

Exam Details

Detail Information
Examination CS (Main) Examination
Year 2018
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 CS (Main) Examination conducted by UPSC in 2018. The paper is designed to test candidates' understanding of advanced mathematical concepts. It has a duration of three hours and carries a maximum of 250 marks. The paper is divided into two sections, with a total of eight questions. Candidates are required to answer five questions, including compulsory questions from each section. This paper is crucial for aspirants aiming for success in the Civil Services examination, providing a clear picture of the expected difficulty and scope of the mathematics syllabus.

Major Topics Covered

  • Matrices
  • Vectors
  • Linear Combinations
  • Limits
  • Calculus
  • Analytical Geometry
  • Eigenvalues
  • Parabolas

Why This Paper is Important

  • Useful for CS (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

  • CS (MAIN) EXAM: 2018 - General Studies Paper-I
  • CS (MAIN) EXAM: 2018 - General Studies Paper-II
  • CS (MAIN) EXAM: 2018 - Mathematics Paper-II
  • CS Main 2018 Mathematics Paper-I Answer Key
  • CS Main Mathematics Syllabus
  • UPSC Civil Services Exam Syllabus
  • CS Main Exam Pattern
  • UPSC Civil Services Exam Pattern

Instructions

  • 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. 1\, [

Questions (page 2)

Section A

Q1.

(a) मान लीजिये कि A एक 3 x 2 आव्यूह है और B एक 2 x 3 आव्युह है। दर्शाइये कि C = A cdot B एक अव्यत्क्रमणीय आव्यह है।
Let A be a 3 × 2 matrix and B a 2 × 3 matrix. Show that C = A \cdot B is a singular matrix.

(b) आधार सदिशों e1 = (1, 0) और e2 = (0, 1) को α_1 = (2, -1) एवं α_2 = (1, 3) के रैखिक संयोग के रूप में व्यक्त कीजिये।
Express basis vectors e1 = (1, 0) and e2 = (0, 1) as linear combinations of α_1 = (2, -1) and α_2 = (1, 3).

(c) निर्धारित कीजिये कि limz→ 1(1-z) tan(π z)/(2) का अस्तित्व है या कि नहीं। अगर यह सीमा विद्यमान है, तो इसका मान ज्ञात कीजिये।
Determine if limz→ 1 (1-z) tan (π z)/(2) exists or not. If the limit exists, then find its value.

(d) सीमा limn → ∞ (1)/(n2) ∑r=0n-1 √(n2 - r2) का मान ज्ञात कीजिये।
Find the limit limn → ∞ (1)/(n2) ∑r=0n-1 √(n2 - r2).

(e) सरल रेखा (x-1)/(2) = (y-1)/(3) = (z + 1)/(-1) का समतल x + y + 2z = 6 पर प्रक्षेपण ज्ञात कीजिये।
Find the projection of the straight line (x-1)/(2) = (y-1)/(3) = (z + 1)/(-1) on the plane x + y + 2z = 6.

Section A

Q2.

(a) अगर A और B समरूप n × n आव्यूह हैं, तो दर्शाइये कि उनके आइगेन मान एक ही है।
Show that if A and B are similar n × n matrices, then they have the same eigenvalues.

(b) बिन्दु (1, 0) से परवलय y2 = 4x तक की न्यूनतम दूरी ज्ञात कीजिये।
Find the shortest distance from the point (1, 0) to the parabola y2 = 4x.

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Frequently asked questions

What is the name of the examination?

The examination is the CS (Main) Examination.

Which paper is this question paper for?

This question paper is for Mathematics (Paper-I).

What is the conducting body for this exam?

The conducting body is UPSC (Union Public Service Commission).

In which year was this examination conducted?

The examination was conducted in the year 2018.

What is the maximum marks for Mathematics Paper-I?

The maximum marks for Mathematics Paper-I is 250.

What is the time allowed to complete the paper?

The time allowed to complete the paper is Three Hours.

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