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MCQs

Total Questions : 69 | Page 7 of 7 pages
Question 61. The number of 5-Sylow subgroup(s) in a group of order 45 is
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option A. -> 1


-NA-


Question 62. Let X = {(x, y)∈ℝ2: x2 + y2 = 1} ∪ ([-1, 1] * {0}) ∪ ({0} * [-1, 1]). Let n0 = max{k: k < ∞, there are k distinct points p1,..., pk ∈ X such that X∖{p1,..., pk}is connected}Let q1,¦,qn0+1 be n0+1 distinct points and Y = X\{q1,¦,qn0+1}. Let m be the number of connected components of Y. The maximum possible value of m is ______
  1.    4
  2.    8
  3.    12
  4.    16
 Discuss Question
Answer: Option B. -> 8


-NA-


Question 63. Let X = {(x, y)∈ℝ2: x2 + y2 = 1} ∪ ([-1, 1] * {0}) ∪ ({0} * [-1, 1]). Let n0 = max{k: k < ∞, there are k distinct points p1,..., pk ∈ X such that X∖{p1,..., pk}is connected}The value of n0 is ______
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4


-NA-


Question 64. Suppose the random variable U has uniform distribution on [0,1] and X =−2logU. The density of X is
  1.    .
  2.    .
  3.    .
  4.    .
 Discuss Question
Answer: Option C. -> .


-NA-


Question 65. Let f be an entire function on ℂ such that |f(z)| ≤ 100 log|z| for each z with |z| ≥ 2. If F(i) = 2i then f(1)
  1.    must be 2
  2.    must be 2i
  3.    must be i
  4.    cannot be determined from the given data
 Discuss Question
Answer: Option B. -> must be 2i


-NA-


Question 66. The number of group homomorphisms from ℤ3 to ℤ9 is ______
  1.    2
  2.    8
  3.    3
  4.    9
 Discuss Question
Answer: Option C. -> 3


-NA-


Question 67. Let X be a convex region in the plane bounded by straight lines. Let X have 7 vertices. Suppose f(x,y) = ax + by + c has maximum value M and minimum value N on X and N < M. Let S = {P ∶ P is a vertex of X and N < f(P) < M}. If S has n elements, then which of the following statements is TRUE?
  1.    n cannot be 5
  2.    n can be 2
  3.    n cannot be 3
  4.    n can be 4
 Discuss Question
Answer: Option D. -> n can be 4


-NA-


Question 68. Which of the following statements are TRUE?P: If f∈L1(ℝ), then F is continuous.Q: If f∈L1(ℝ) and lim|x|→∞f(x) exists, then the limit is zero.R: If f∈L1(ℝ), then f is bounded.S: If f∈L1(ℝ) is uniformly continuous, then lim|x|→∞f(x) exists and equals zero.
  1.    Q and S only
  2.    P and R only
  3.    P and Q only
  4.    R and S only
 Discuss Question
Answer: Option A. -> Q and S only


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Question 69. Let S = {z ∈ ℂ∶ |z|=1} with the induced topology from ℂ and let f:[0,2] → S be defined as f(t) = e2πit. Then, which of the following is TRUE?
  1.    K is closed in [0,2] ==> f(K)is closed in S
  2.    U is open in [0,2] ==> f(U) is open in S
  3.    f(X) is closed in S ==> X is closed in [0,2]
  4.    f(Y) is open in S ==> Y is open in [0,2]
 Discuss Question
Answer: Option A. -> K is closed in [0,2] ==> f(K)is closed in S


-NA-


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