Làm giúp mình câu b và f nha =3

khathieugia7

2 năm trước

Loga Sinh Học lớp 12

0 lượt thích 11 xem

1 trả lời

Thích Trả lời

bichhuyenchi

Đáp án + Giải thích các bước giải:

`b)`

`A=(-5)/17 . 9/(-23) + 9/23 . (-22)/17 + ( 290 - 11 9/23 )`

`= 5/17 . 9/23 - 9/23 . 22/17 + 290 - 11 - 9/23`

`= 9/23 . ( 5/17 - 22/17 ) + 279 - 9/23`

`= 9/23 . ( 5/17 - 22/17 - 1 ) + 279`

`= 9/23 . (-2) + 279 = -18/23 +279`

`= 6399/23`

`f)`

`A=(63/9.18+21/14.17):(14/9.13+14/14.18+14/13.17)`

`=7.(9/9.18+3/14.17):[7/2 . (4/9.13+4/14.18+4/13.17)]`

`=7.(1/9-1/18+1/14-1/17):[7/2.(1/9-1/13+1/14-1/18+1/13-1/17)]`

`=7.(1/9-1/18+1/14-1/17):[7/2.(1/9+1/14-1/18-1/17)]`

`=7:7/2=2`

Vote (0) Phản hồi (0) 2 năm trước

tramanhsff

`b, A = ( - 5 )/17 . 9/-23 + 9/23 . ( - 22 )/17 + ( 290 - 11 9/23 )`

`A = ( ( - 5 ) . 9 )/( 17 . ( - 23 ) ) + 9/23 . ( - 22 )/17 + 6408/23`

`A = 5/17 . 9/23 + 9/23 . ( - 22 )/17 + 6408/23`

`A = 9/23 . ( 5/17 + ( - 22 )/17 ) + 6408/23`

`A = 9/23 . ( - 1 ) + 6408/23`

`A = ( - 9 )/23 + 6408/23`

`A = 6399/23`

`f, A = ( 63/( 9 . 18 ) + 21/( 14 . 17 ) ) : ( 14/( 9 . 13 ) + 14/( 14 . 18 ) + 14/( 13 . 17 ) )`

`A = 7 . ( 9/( 9 . 18 ) + 3/( 14 . 17 ) ) : [ 7/2 . ( 4/( 9 . 13 ) + 4/( 13 . 17 ) + 4/( 14 . 18 ) )`

`A = 7 . ( 1/9 - 1/18 + 1/14 - 1/17 ) : [ 7/2 . ( 1/9 - 1/13 + 1/13 - 1/17 + 1/14 - 1/18 ) ]`

`A = 7 . ( 1/9 - 1/18 + 1/14 - 1/17 ) : [ 7/2 . ( 1/9 - 1/7 + 1/14 - 1/18 ) ]`

`A = 7 : 7/2`

`A = 2`

Vote (0) Phản hồi (0) 2 năm trước

Các câu hỏi liên quan

Giải các phương trình sau: a. 2x^3+6x^2=x^2+3x b. (2x+5)^2=(x+2)^2 c. |x - 4|= -3x+5 Mình đang cần rất gấp ạh, mình hứa sẽ vote 5 sao

giải giúp mình với mình đang cần gấp

Hết điểm rồi ạ giúp em vs plsssss

giúp mình zới ...........................

vẽ đậu mầm nl:??????????????????????????????

giải giúp mình với mình đang cần gấp

Turn the following questions into the Passive voice. 1. Do scientists do experiments?  2. Is Mary wearing a new skirt at the moment?  3. Where did they leave their bags?  4.  Is the cat chasing the mouse?  5. Have they asked the actress personal questions?  6. Can Mr Jones teach English?  7. Are they going to feed the baby?  8. Did Peter find the missing key?  9. Have they sold their house?  10. How did he find the solution to the problem?  11. Why is Peter making dinner today?  12. Can you show me your homework, please?  13. Will they have repaired your car by Tuesday?  14. Were the children playing football when they arrived? 15. How many stamps have you collected?  16. Are mum and dad paying the bill now?  17. Will they give you money for the trip?  18. Did they demolish the old building last week?  19. Has Sheila opened the window?  20. Does your mum do all the housework?

giải giúp mình với mình đang cần gấp

Thêm từ: 1.I had arranged to meet my friends at the bowling alley. (at six) 2.I ran through the park. (quickly) 3. I got to the bowling alley. (at half-past six) 4.My friends were waiting at the entrance. (patiently) 5. I played badly. (most of the evening) 6. I kept thinking about the things I had to do at home. (later that evening) Ai lm nhanh sẽ dc ctlhn

Giúp mình câu b với ạ, mình cảm ơn nhiều

Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến