a) A= ( 28.4.13+ 27.8.65) : ( 29.3)
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22 tháng 7 2021
b) Ta có: \(Q=\dfrac{\left(29\cdot3+29\cdot5\right)}{212}\)
\(=\dfrac{29\cdot\left(3+5\right)}{212}\)
\(=\dfrac{29\cdot8}{212}=\dfrac{58}{53}\)
PL
2
22 tháng 7 2023
\(=\dfrac{5\cdot2^{18}\cdot3^{18}\cdot2^{12}-2\cdot2^{28}\cdot3^{14}\cdot3^4}{5\cdot2^{28}\cdot3^{18}-7\cdot2^{29}\cdot3^{18}}\)
\(=\dfrac{2^{29}\cdot3^{18}\left(5\cdot2-1\right)}{2^{28}\cdot3^{18}\left(5-7\cdot2\right)}=\dfrac{2\cdot9}{-9}=-2\)
TV
4
BD
1
DD
1
DQ
0
9 tháng 3 2022
Exercise 4: Choose the correct form.
27.1. Our dog is amazing - it __________ sing!
a. should
b. must
c. can
d. might
28.2. Bring your umbrella - it __________ rain later.
a. can
b. might
c. must
d. should
29.3. All students __________ wear their uniforms to school.
a. should
b. will
c. may
d. must
30.4. We __________ wash our hands before we have our meals.
a. could
b. can
c. should
d. might
31.5. __________ we go to the beach today? ~ Great!
a. Shall
b. Will
c. Might
d. Should
32.6. Students __________ use a dictionary during the test. It’s forbidden.
a. can’t
b. mustn’t
c. might not
d. won’t
33.7. I __________ go to the football match but I don’t know yet.
a. can’t
b. shouldn’t
c. might not
d. mustn’t
34.8. Ingrid __________ play the violin when she was six.
a. can’t
b. could
c. might
d. shouldn’t
35.9. __________ you like something to drink?
a. Could
b. Should
c. Will
d. Would
36.10. I’m afraid of water because I __________ swim.
a. can’t
b. may
c. couldn’t
d. must
9 tháng 3 2022
Exercise 4: Choose the correct form.
27.1. Our dog is amazing - it __________ sing!
a. should
b. must
c. can
d. might
28.2. Bring your umbrella - it __________ rain later.
a. can
b. might
c. must
d. should
29.3. All students __________ wear their uniforms to school.
a. should
b. will
c. may
d. must
30.4. We __________ wash our hands before we have our meals.
a. could
b. can
c. should
d. might
31.5. __________ we go to the beach today? ~ Great!
a. Shall
b. Will
c. Might
d. Should
32.6. Students __________ use a dictionary during the test. It’s forbidden.
a. can’t
b. mustn’t
c. might not
d. won’t
33.7. I __________ go to the football match but I don’t know yet.
a. can’t
b. shouldn’t
c. might not
d. mustn’t
34.8. Ingrid __________ play the violin when she was six.
a. can’t
b. could
c. might
d. shouldn’t
35.9. __________ you like something to drink?
a. Could
b. Should
c. Will
d. Would
36.10. I’m afraid of water because I __________ swim.
a. can’t
b. may
c. couldn’t
d. must
B
19 tháng 2 2023
1.She (not/be).........wasn't.............interested in the book because she didn't understand it.
2.My sister(work)..........has worked............as a business woman since she (be)......was.........29.
3.-(You/watch)........Did you watch................the football match on TV last night?
-Yes,I (do)..........did.........It (be)......was.............very exciting
4.(Lan/sometimes/walk)..............Does Lan sometimes walk........................to school?
5.Right now,Tom(work)..........is working......in his office .He (often/work)...........often works...........at this time.
6.-How long (he/work)......has he been working.................in this company?
-He (work)..........has worked............here for 3 months
7.My father (already/buy)....................has already bought.........that car
8.This is the second time Tom(meet)............has met.........his uncle
9.Their parents (go)..............went...........out for dinner last night
10.My grandfather (live).......has been living.........in HCM city for ten years.
11.(Lan /borrow).........Has Lan borrowed....................some books from the library since Monday?
12.They (leave).........left............Ha Noi for HCM city yesterday
DT
0
Ta có
\(2^8.4.13=2^9.26\)
\(2^7.8.65=2^9.130\)
Nên \(2^8.4.13+2^7.8.65=2^9.156\)
Mà \(2^9:2^9=1\)
\(156:3=52\)
Do đó A = 52