1456 . (a+b),a2-b2,a3-b3 এর গ.সা.গু কত ? ..
- B. 1
- C. a-b
- D. a+b
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1457 . x+1x=4 হলে, এর মান কত ? ..
- A. 4
- B. 3
- C. 2
- D. 1
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1458 . x2+y2=18 এবং xy=7 হলে, এর মান কত? ..
- A. 4
- B. 5
- C. 6
- D. 7
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1459 . ax=b,by=c এবং হয় তবে, xyz এর মান কত হবে? ..
- A. 2
- B. 1
- C. -2
- D. -1
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1460 . x4=0.1 হলে, x=? ..
- A. 0.1
- B. 0.01
- C. 0.001
- D. 0.0001
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1461 . যদি a+b+c=5 ,a2+b2+c2=9 হয়, তবে ab+bc+ca = কত? ..
- A. 16
- B. 8
- C. 34
- D. 12
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1462 . a2-c2-2ab+b2 এর সঠিক উৎপাদক পরিধি কত? ..
- A. (a+b+c)(a-b+c)
- B. (a-b-c)(a-b+c)
- C. (a-b-c)(a+b-c)
- D. (a+b+c)(a-b-c)
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1463 . (17)0x= কত ? ..
- A. 17x
- B. 17
- C. x
- D. 1
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