Q. What is the characteristic polynomial of the matrix A = [[1, 2], [3, 4]]?
  • A. λ^2 - 5λ - 2
  • B. λ^2 - 5λ + 2
  • C. λ^2 + 5λ + 2
  • D. λ^2 + 5λ - 2
Q. What is the characteristic polynomial of the matrix A = [[2, 1], [1, 2]]?
  • A. λ^2 - 3λ + 3
  • B. λ^2 - 3λ + 1
  • C. λ^2 - 5λ + 2
  • D. λ^2 - 2λ + 1
Q. What is the circumradius of a triangle with sides 5, 12, and 13?
  • A. 6.5
  • B. 7
  • C. 8
  • D. 9
Q. What is the circumradius of a triangle with sides 6, 8, and 10?
  • A. 5
  • B. 6
  • C. 7
  • D. 8
Q. What is the circumradius of a triangle with sides 7, 24, and 25?
  • A. 12.5
  • B. 13
  • C. 14
  • D. 15
Q. What is the circumradius of an equilateral triangle with side length a?
  • A. a/√3
  • B. a/2
  • C. a/√2
  • D. a/√3
Q. What is the circumradius R of a triangle with sides a = 7, b = 24, c = 25?
  • A. 12
  • B. 10
  • C. 15
  • D. 20
Q. What is the circumradius R of a triangle with sides a, b, c?
  • A. abc/4A
  • B. A/(abc)
  • C. 2A/(a+b+c)
  • D. a+b+c/2
Q. What is the coefficient of static friction if a block on a horizontal surface begins to slide at a force of 20 N and the normal force is 50 N?
  • A. 0.2
  • B. 0.4
  • C. 0.5
  • D. 0.6
Q. What is the coefficient of variation if the mean is 50 and the standard deviation is 5?
  • A. 5%
  • B. 10%
  • C. 15%
  • D. 20%
Q. What is the coefficient of variation if the mean is 50 and the standard deviation is 10?
  • A. 20%
  • B. 10%
  • C. 15%
  • D. 25%
Q. What is the coefficient of x^0 in the expansion of (3x - 4)^5?
  • A. -1024
  • B. 243
  • C. -243
  • D. 1024
Q. What is the coefficient of x^0 in the expansion of (x + 5)^3?
  • A. 125
  • B. 100
  • C. 75
  • D. 50
Q. What is the coefficient of x^0 in the expansion of (x + 5)^5?
  • A. 3125
  • B. 625
  • C. 125
  • D. 25
Q. What is the coefficient of x^2 in the expansion of (3x - 4)^4?
  • A. 144
  • B. 216
  • C. 432
  • D. 576
Q. What is the coefficient of x^2 in the expansion of (x - 4)^6?
  • A. 240
  • B. 360
  • C. 480
  • D. 720
Q. What is the coefficient of x^3 in the expansion of (2x + 3)^5?
  • A. 90
  • B. 100
  • C. 120
  • D. 150
Q. What is the coefficient of x^4 in the expansion of (2x + 3)^6?
  • A. 540
  • B. 720
  • C. 810
  • D. 960
Q. What is the coefficient of x^4 in the expansion of (2x - 3)^5?
  • A. 240
  • B. 300
  • C. 360
  • D. 420
Q. What is the coefficient of x^4 in the expansion of (x + 1)^6?
  • A. 15
  • B. 20
  • C. 30
  • D. 35
Q. What is the coefficient of x^5 in the expansion of (x + 1/2)^10?
  • A. 252
  • B. 210
  • C. 120
  • D. 300
Q. What is the coefficient of x^5 in the expansion of (x + 2)^7?
  • A. 21
  • B. 42
  • C. 35
  • D. 28
Q. What is the coefficient of x^5 in the expansion of (x + 2)^8?
  • A. 672
  • B. 1280
  • C. 960
  • D. 720
Q. What is the coefficient of x^5 in the expansion of (x + 3)^8?
  • A. 1680
  • B. 1440
  • C. 1260
  • D. 1080
Q. What is the coefficient of x^6 in the expansion of (x + 5)^8?
  • A. 6720
  • B. 5600
  • C. 4480
  • D. 3360
Q. What is the color of the complex ion [Cu(H2O)6]2+?
  • A. Blue
  • B. Green
  • C. Yellow
  • D. Red
Q. What is the color of the complex [Cu(H2O)6]2+?
  • A. Blue
  • B. Green
  • C. Red
  • D. Yellow
Q. What is the combined gas law equation?
  • A. PV = nRT
  • B. P1V1/T1 = P2V2/T2
  • C. P1V1 = P2V2
  • D. V1/T1 = V2/T2
Q. What is the common oxidation state of actinides in their compounds?
  • A. +3
  • B. +4
  • C. +5
  • D. +6
Q. What is the common oxidation state of alkali metals?
  • A. +1
  • B. +2
  • C. 0
  • D. -1
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