Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Complex Numbers question

2023 · Shift 1 · Q34
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Advanced
  3. /Mathematics
  4. /Complex Numbers
  5. /2023 · Shift 1 · Q34

Complex Numbers question

2023 · Shift 1 · Q34

JEE AdvancedMathematicsComplex NumbersMCQ+3 / −1
Let zzz be a complex number satisfying ∣z∣3+2z2+4zˉ−8=0|z|^3+2 z^2+4 \bar{z}-8=0∣z∣3+2z2+4zˉ−8=0, where zˉ\bar{z}zˉ denotes the complex conjugate of zzz. Let the imaginary part of zzz be nonzero.

Match each entry in List-I to the correct entries in List-II.

List - I List - II
(P) ∣z∣2|z|^2∣z∣2 is equal to (1) 12
(Q) ∣z−zˉ∣2|z-\bar{z}|^2∣z−zˉ∣2 is equal to (2) 4
(R) ∣z∣2+∣z+zˉ∣2|z|^2+|z+\bar{z}|^2∣z∣2+∣z+zˉ∣2 is equal to (3) 8
(S) ∣z+1∣2|z+1|^2∣z+1∣2 is equal to (4) 10
(5) 7

The correct option is:
  1. A
    (P)→(1)(Q)→(3)(R)→(5)(S)→(4)(P) \rightarrow(1) \quad(Q) \rightarrow(3) \quad(R) \rightarrow(5) \quad(S) \rightarrow(4)(P)→(1)(Q)→(3)(R)→(5)(S)→(4)
  2. B
    (P)→(2)(Q)→(1)(R)→(3)(S)→(5)(P) \rightarrow(2) \quad(Q) \rightarrow(1) \quad(R) \rightarrow(3) \quad(S) \rightarrow(5)(P)→(2)(Q)→(1)(R)→(3)(S)→(5)
  3. C
    (P)→(2)(Q)→(4)(R)→(5)(S)→(1)(P) \rightarrow(2) \quad(Q) \rightarrow(4) \quad(R) \rightarrow(5) \quad(S) \rightarrow(1)(P)→(2)(Q)→(4)(R)→(5)(S)→(1)
  4. D
    (P)→(2)(Q)→(3)(R)→(5)(S)→(4)(P) \rightarrow(2) \quad(Q) \rightarrow(3) \quad(R) \rightarrow(5) \quad(S) \rightarrow(4)(P)→(2)(Q)→(3)(R)→(5)(S)→(4)
PreviousNext

More from Complex Numbers

  • Let z be a complex number with a non-zero imaginary part. If 2−3z+4z22+3z+4z2​ is a real number, then the value of ∣z∣2 is ​.2022 · Numerical
  • Let zˉ denote the complex conjugate of a complex number z and let i=−1​. In the set of complex numbers, the number of distinct roots of the equation zˉ−z2=i(zˉ+z2) is ​…2022 · Numerical
  • Let zˉ denote the complex conjugate of a complex number z. If z is a non-zero complex number for which both real and imaginary parts of (zˉ)2+z21​ are integers, then which of the following is/are possible…2022 · Multiple correct
  • Let θ1​,θ2​,…,θ10​ be positive valued angles (in radian) such that θ1​+θ2​+⋯+θ10​=2π. Define the complex numbers z1​=eiθ1​,zk​=zk−1​eiθk​ for $k=2,3, \ldots,…2021 · MCQ
  • For any complex number w = c + id, let arg(w)∈(−π,π], where i=−1​. Let α and β be real numbers such that for all complex numbers z = x + iy satisfying arg(z+βz+α​)=4π​…2021 · Multiple correct
  • Let S be the set of all complex numbers z satisfying |z2 + z + 1| = 1. Then which of the following statements is/are TRUE?2020 · Multiple correct
  • For a complex number z, let Re(z) denote that real part of z. Let S be the set of all complex numbers z satisfying z4−∣z∣4=4iz2, where i = −1​. Then the minimum possible value of |z1 − z2|2, where z1, z2 ∈ S…2020 · Numerical
  • Let S be the set of all complex numbers z satisfying ∣z−2+i∣≥5​. If the complex number z0 is such that ∣z0​−1∣1​ is the maximum of the set {∣z0​−1∣1​:z∈S}…2019 · MCQ