Processing math: 100%

MCQ Test Page

  1. If ∗ is a binary operation in a set A, then for all a,b∈A
    1. a+b∈A
    2. a−b∈A
    3. a×b∈A
    4. a∗b∈A
  2. If z=(1,3) then z−1=
    1. (110,310)
    2. (−110,310)
    3. (110,−310)
    4. (−110,−310)
  3. 32+2i=
    1. 1−i
    2. 1+i
    3. −2i
    4. 3−3i4
  4. ¯z1+z2=
    1. ¯z1+¯z2
    2. ¯z1−¯z2
    3. ¯z1+z2
    4. z1+¯z2
  5. |z1+z2|
    1. >|z1|+|z2|
    2. ≤|z1|+|z2|
    3. ≤z1+z2
    4. >z1+z2
  6. If z1=2+i, z2=1+3i, then z1−z2=
    1. 1−7i
    2. −1+7i
    3. 1−2i
    4. 3+4i
  7. If z1=2+i, z2=1+3i, then −ilm(z1−z2)=
    1. 2i
    2. −2i
    3. 2
    4. 3
  8. Which of the following sets has closure property with respect to multiplication?
    1. {−1,1}
    2. {−1}
    3. {−1,0}
    4. {0,2}
  9. The multiplicative inverse of 2 is
    1. 0
    2. 1
    3. −2
    4. 12