Ai giải giúp mik với ạ <333
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NQ
3
XO
8 tháng 6 2020
Ta có A = \(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{19.20}=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{19}-\frac{1}{20}=1-\frac{1}{20}\)
\(=\frac{19}{20}\)
MJ
1
1 tháng 8 2021
9 will have to
10 must work
11 will you do - fail
12 will you do
13 were - would buy
14 were - would help
15 had - would travel
16 had - would go
17 would tell - were
18 knew - would speak
19 gets - will go
20 can play - is
21 isn't raining - will have
22 had - would finish
23 wouldn't do - were
24 didn't speak
25 would buy - had
26 weren't - would buy
27 goes
28 will she go
29 would you do - were
30 were - would help
31 would you buy - were
32 would she do - were
33 will they do - become
34 would Ba go - had
35 had been - would have helped
36 had had - would have bought
37 hadn't bought - would have bought
38 would have been - hadn't rained
39 wouldn't have done
40 would have bought
41 would you do
42 would you have done
43 would you have done
44 would you have bought
45 has
46 would have come
III.
1 I will visit you
2 I would travel around the world
3 we will fail the final term test
4 you should take care of her
5 I would run away
6 we will go on a picnic
7 I would have got a good mark
8 he wouldn't be so fat now
9 I would kill it
1 tháng 5 2018
Khi thêm số tự nhiên a vào cả tử số và mẫu số của phân số 11/19 thì hiệu giữa tử số và mẫu số không đổi
Hiệu giữa tử số và mẫu số là :
19 - 11 = 8
Tử số sau khi thêm là :
8 : ( 3 - 2 ) x 2 = 16
Số tự nhiên a là :
16 - 11 = 5
Đáp số : 5
LT
4
VL
16 tháng 2 2017
Ta có: 333444 = (3334)111
444333= (4443)111
Hai số đã có cùng số mũ, giờ ta so sánh 3334 với 4443
3334 = (3.111)4=34.1114=81.1114
4443= (4.111)3=43.1113=64.1113
Rõ ràng ta thấy: 81.1114>64.1113=>3334>4443
Từ đó suy ra: 333444>444333
K nha! Kb nha!
16 tháng 2 2017
ta có:
\(333^{444}=333^{4\cdot111}=12296370321^{111}\)
\(444^{333}=444^{3\cdot111}=87528384^{111}\)
=>\(333^{444}>444^{333}\)
tk mk nhé
12 tháng 5 2022
Diện tích của mảnh đất là : ( 32 + 64 ) x 40 : 2 = 1920 ( m2)
Diện tích đất trồng cây là : 1920 x 60 : 100 = 1152 ( m2)
Đ/s : 1152 m2
Sorry bn mình vừa đi học về nên giải bài muộn !!!
NV
0
NV
1
