1066 . x + 1/x = √3 হলে x3 + 1/x3 এর মান কত? 3
  • A. 2
  • B. 4
  • D. 6
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1067 . 1/2{(a + b)2 + (a - b)2} = কত?
  • A. a2 + b2
  • B. a2 - b2
  • C. (a + b)2/2 - (a - b)2/2
  • D. (a + b)2 + ( a - b)2
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1068 . a + 1/a = 2 হলে a2 + 1/a2 = কত?
  • A. 2
  • B. 4
  • C. 8
  • D. 12
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1069 . যদি √x + 1/√x = a হয়, তবে x2 + 1/x2 এর মান কত?
  • A. a4 - 2a2 + 2
  • B. a4 + 4a2 + 2
  • C. a4 - 4a2 - 2
  • D. a4 - 4a2 + 2
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1070 . a + b = 13 এবং ab = 36 হলে a - b এর মান কত?
  • A. 5
  • B. 8
  • C. 10
  • D. 7
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1071 . x2 + 1/x2 এর মান কত হলে √x + 1/√x = 2 হবে?
  • A. 2
  • B. 6
  • C. - 8
  • D. - 2
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1072 . a - 1/a = p হলে, a2 + 1/a2 এর মান কত?
  • B. p2 + 2
  • C. p2 - 2
  • D. p3
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1073 . p - q = 2 এবং pq = 3 হলে, p + q এর মান কত?
  • A. 4
  • B. - 8
  • C. ± 4
  • D. 8
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1074 . x + y = 12 এবং x - y = 2 হলে, x2 + y2 = কত?
  • A. 35
  • B. 37
  • C. 74
  • D. 70
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1075 . a - 1/a = 4 হলে, a2 + 1/a2 = কত?
  • A. 18
  • B. 22
  • C. 16
  • D. 14
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1076 . a2 + 1 = 4a হুলে, a/(a2 - 3a + 1) এর মান কত?
  • A. a
  • B. 1
  • C. 2a
  • D. 2
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1077 . x + y + z = 15 এবং x2 + y2 + z2 = 83 হলে, xy + yz + zx এর মান কোনটি?
  • A. 71
  • B. 72
  • C. 32
  • D. 16
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1078 . x2 + 1 = √2x হলে, x2 + 1/x2 এর মান কত?
  • A. 1
  • C. 4
  • D. 2
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1079 . x + y = √7, x - y = √3 হলে, 8xy(x2 + y2) এর মান কোনটি?
  • A. 8
  • B. 40
  • C. 20
  • D. 25
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1080 . a - b = 4 এবং ab = 0 হলে, a3 - b3 = কত?
  • A. 54
  • B. 64
  • C. 48
  • D. 44
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