1
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
1. The difference of Z and its conjugate is an imaginary number.
2. The sum of Z and its conjugate is a real number.
2
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
What is the modulus of the complex number i2n + 1(-i)2n - 1, where n ∈ N and i = √-1?
3
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
The smallest positive integer n for which
$\rm \left(\frac{1-i}{1+i}\right)^{n^2}=1$
where i = √-1, is
4
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
If Z = 1 + i, where i = √-1, then what is the modulus of $\rm z+\frac{2}{z}?$
Questions Asked from Complex Numbers (Marks 2.5)
Number in Brackets after Paper Indicates No. of Questions
NDA Subjects
Mathematics
Algebra
Sets, Relations and FunctionsLogarithmsQuadratic Equations and InequalitiesSequence And SeriesBinomial TheoremMatricesDeterminantsPermutations and CombinationsProbabilityComplex NumbersVector AlgebraThree Dimensional GeometryStatistics
Trigonometry
Trigonometric Angles and EquationsInverse Trigonometric FunctionHeight and DistanceProperties of Triangles
Coordinate Geometry
Calculus
English
General Studies