361 . 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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363 . a - 1/a = 4 হলে, a2 + 1/a2 = কত?
- A. 18
- B. 22
- C. 16
- D. 14
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364 . x + y = 12 এবং x - y = 2 হলে, x2 + y2 = কত?
- A. 35
- B. 37
- C. 74
- D. 70
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365 . p - q = 2 এবং pq = 3 হলে, p + q এর মান কত?
- A. 4
- B. - 8
- C. ± 4
- D. 8
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366 . a - 1/a = p হলে, a2 + 1/a2 এর মান কত?
- B. p2 + 2
- C. p2 - 2
- D. p3
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367 . x2 + 1/x2 এর মান কত হলে √x + 1/√x = 2 হবে?
- A. 2
- B. 6
- C. - 8
- D. - 2
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368 . a + b = 13 এবং ab = 36 হলে a - b এর মান কত?
- A. 5
- B. 8
- C. 10
- D. 7
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369 . 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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370 . a + 1/a = 2 হলে a2 + 1/a2 = কত?
- A. 2
- B. 4
- C. 8
- D. 12
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371 . 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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372 . x + 1/x = √3 হলে x3 + 1/x3 এর মান কত? 3
- A. 2
- B. 4
- D. 6
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373 . (y - z) (z - x) (x - y) = কত?
- B. 2(x + y + z)
- C. x - y - z
- D. x + y + z
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374 . m2 + 2mn এর সাথে কত বিয়োগ করলে সেটি একটি পূর্ণবর্গ হবে?
- A. -n2
- B. n2
- C. 2mn
- D. m2
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375 . a + 1/a = 2 হলে a/(a2 + a - 1) এর মান কত?
- A. 4
- B. 3
- C. 2
- D. 1
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