Nếu n là số nguyên dương; b, c là số thực dương và a > 1 thì log 1 a b n c 2 bằng

A.  1 n log a b - 1 2 log a c

B.  n log a b - 2 log a c

C.  1 n log a b + 2 log a c

D.  - 1 n log a b + 2 log a c

1,she (work)............works.........in a factory

2,every day,she (get)............gets..........up early.she (get)..........gets............at 5o'clock

3,she (brush)....brushes...............het teeth and (wash)....washes...................her face

4,then,she (do)........does..................the housework

5,she (have).............has...............breakfast at half past six

6,then she (go)........goes.................to work at fifteen to seven

7,she (go)................goes.........home at half past four

8.they (work)...........work....................vey hard

9,their classrooms (be not).................aren't.............on the four floor

10,i (not play)............don't play....................games with them

11,they (love)...............love...................english

12,he (carry)............carries..............a big tv

13,they (sweep)..........sweep...................the floor

14,i (not use)..........don't use..................this pen to draw

15,in this club people usually (dance)........dance...............a lot

16,Linda (not take care)............doesn't take care....................og her sister carefully

17,Jonhn (leave).............leaves.............the country

18, we (live)...........live..................in the city most of the year

19,you always(teach).........teach.................me new things câu này câu hỏi bn

20,she (help)........helps.....................the kids of the neighborhood

Tập nghiệm của bất phương trình  5 3 x − 1 < 5 x + 3

A.  − ∞ ; − 5

B.  − ∞ ; 0

C.  − 5 ; + ∞

D.  0 ; + ∞