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Recent questions tagged complex numbers
+2
votes
1
answer
If z **** on the circle |z - 1| = 1 then (z - 2)/ z equals
asked
Apr 6, 2019
in
JEE
by
kratos
class-11
jee
quadratic equations
jee mains
complex numbers
+3
votes
1
answer
There are two circles x2+y2=9 and x2+y3-8x-6y+n2=0.
asked
Apr 6, 2019
in
Class 12
by
kratos
class-11
matrices
class-10
determinants
coordinate geometry
class-12
complex numbers
+2
votes
1
answer
If ω( ≠ 1 ) is a cube root of unity and (1 + ω)^7 = A + Bω Then, (A, B) is equal to
asked
Apr 6, 2019
in
JEE
by
kratos
jee
class-12
complex numbers
jee mains
+2
votes
1
answer
Define modulus of a complex number.
asked
Apr 6, 2019
in
JEE
by
kratos
class-11
jee
quadratic equations
jee mains
complex numbers
+2
votes
1
answer
If z and w are two complex numbers such that |zw| =1 and arg (z) – arg (w) = π/2 , then show that (Bar) z w = – i
asked
Apr 5, 2019
in
JEE
by
kratos
complex numbers and quadratic equation
class-11
jee
quadratic equations
jee mains
complex numbers
+3
votes
1
answer
If |ai| < 2, i = 1,2,3, , n and∑ aizi = 1 n∈ [i=1,n] then
asked
Apr 5, 2019
in
JEE
by
kratos
jee main 2020
jee
jee mains
binomial theorem
class-12
complex numbers
tangents and normals
+2
votes
1
answer
The value of λ such that sum of the squares of the roots of the quadratic equation, x^2 + (3 – λ)x + 2 = λ has the least value is
asked
Apr 4, 2019
in
JEE
by
kratos
jee
quadratic equations
jee mains 2019
jee mains
complex numbers
+1
vote
1
answer
In rate expression what is the negative symbol represents
asked
Apr 3, 2019
in
JEE
by
kratos
class-8
electronic device
map reading
jee
electric current and its effects
class-7
jee mains
effects of electric current
complex numbers
+3
votes
1
answer
Let θ1 and θ2 (where θ1 < θ2)are two solutions of 2cot^2θ – 5/sinθ + 4 = 0, θ ∈ [0, 2) then
asked
Apr 3, 2019
in
JEE
by
kratos
jee main 2020
jee
jee mains
coordinate geometry
complex numbers
+1
vote
1
answer
For any complex number z, the minimum value of 5 |z + 1| + |(3 + 4i) (z – 2)| is
asked
Apr 2, 2019
in
JEE
by
kratos
jee
jee mains 2019
complex numbers
jee mains
+2
votes
1
answer
Let t be a complex number *.t. |t| = 1, then z = (at + b)/ (t - c) describes ( where a and b are also complex numbers)
asked
Apr 2, 2019
in
JEE
by
kratos
jee
complex numbers
jee mains
+1
vote
1
answer
If |z -5i| / |z+5i| = 1. Prove that complex number z lie on x-asis.
asked
Apr 2, 2019
in
JEE
by
kratos
class-11
jee
quadratic equations
jee mains
complex numbers
+1
vote
1
answer
The number of solutions of z^5 + bar z = 0 is (A) 3 (B) 5 (C) 7
asked
Apr 1, 2019
in
JEE
by
kratos
jee advanced 2018
jee
jee advanced
jee mains
class-12
complex numbers
+3
votes
1
answer
The points z1, z2, z3, z4 in the complex plane are the vertices of a parallelogram taken in order, if and only if
asked
Apr 1, 2019
in
JEE
by
kratos
jee
class-11
complex numbers
jee mains
+1
vote
1
answer
If |z1 | = 1, |z2 | = 2, |z3 | = 3 and |9z1 z2 + 4z1 z3 + z2 z3 | = 12, then the value of |z1 + z2 + z3 | is equal to
asked
Apr 1, 2019
in
JEE
by
kratos
class-11
jee
jee mains
class-12
complex numbers
+2
votes
1
answer
Let j Z = (3 + 2i sinθ)/(1 - 2i sinθ) and Z = bar Z then θ =_____________ (a) (2k + 1)π/2, k ∈ z
asked
Apr 1, 2019
in
JEE
by
kratos
jee
class-12
complex numbers
jee mains
+3
votes
1
answer
Given A = [(2,-3)(-4,7)], compute A^–1 and show that 2A^–1 = 9I – A.
asked
Mar 31, 2019
in
Class 12
by
kratos
cbse
adjoint
inverse of a matrix
matrices
class-10
icse
class-12
complex numbers
+3
votes
1
answer
z and ω are two nonzero complex number such that | z | = | ω | and Arg z^+ Arg ω = π then z equals
asked
Mar 30, 2019
in
JEE
by
kratos
class-11
jee
quadratic equations
jee mains
complex numbers
+2
votes
1
answer
For any two complex numbgts z1, z2 and any real numbers a and b, |az1 - bz2|^2 + |bz1 + az2|^2 = ....
asked
Mar 29, 2019
in
JEE
by
kratos
class-11
jee
quadratic equations
agents
jee mains
the central nervous system
complex numbers
+3
votes
1
answer
Let z1 & z2 be non-zero complex numbers 1satisfying the equation, Z1^2 – 2z1z2 + 2z2^2= 0.
asked
Mar 29, 2019
in
JEE
by
kratos
class-11
jee
quadratic equations
jee mains 2019
jee mains
complex numbers
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