1902 + 1 + 1 + 1 + 1 + 1
K
Khách
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22 tháng 12 2015
\(\frac{2013\cdot2014-1902}{2013\cdot2013+111}=\frac{2013\cdot\left(2013+1\right)-1902}{2013\cdot2013+111}=\frac{2013\cdot2013+2013-1902}{2013\cdot2013+111}=\frac{2013\cdot2013+111}{2013\cdot2013+111}=1\)
=>đpcm
22 tháng 6 2020
1. It’s not easy for them to translate these poem into English.
They found it difficult to translate these poem into English
2. The man found a lot in gold in the island in 1902
It was the man who found a lot of gold in the island in 1902
6 tháng 7 2021
The Wright brothersstarted flying in 1902.Their first flight was in a glider,which they designed to test the stability of its wings.Once they (1)....were.... satisfied that they could fly in the air steadily,without the fear (2)....of.... falling straight down,they began working on their design for the first aeroplane.(3)....It.... would be propelledby a motor.They wrote to several carmakers,asking (4)...if.... they could build a motor for them,but most either did not reply (5)....or.... said they were too busy.Finally,they decied to build the motor (6)...themselves.... The major problem they faced was how to make the motor powerful (7)...enough... to propel the aeroplane withoutbeing too heavy.They soon relised that they would need to make the aeroplane bigger,(8)...rather...than make the motor smaller.After months os planning,they were ready to build the first prototype.It was a looking machine (9)....with.... four wings and no seat for the pilot.The two brothers were very (10)....proud... of their invention but could not decide (11)...who... would be the one to fly it.They tossed a coin and Wilbur won.The world's first ever aeroplane (12)...took.... off and flew into the air,making history.
AH
Akai Haruma
Giáo viên
17 tháng 6 2019
Lời giải:
Gọi $R(x)$ là đa thức dư khi chia $P(x)$ cho $(x-1)(x-2)(x-3)(x-4)$. Bậc của $R(x)$ phải nhỏ hơn bậc đa thức chia. Do đó đặt:
\(R(x)=ax^3+bx^2+cx+d\)
\(P(x)=Q(x)(x-1)(x-2)(x-3)(x-4)+ax^3+bx^2+cx+d\)
Trong đó $Q(x)$ là đa thức thương.
Theo định lý Bê-du về phép chia đa thức:
\(\left\{\begin{matrix} P(1)=a+b+c+d=-2019\\ P(2)=8a+4b+2c+d=-2036\\ P(3)=27a+9b+3c+d=-2013\\ P(4)=64a+16b+4c+d=-1902\end{matrix}\right.\)
\(\Rightarrow \left\{\begin{matrix} a=8\\ b=-28\\ c=11\\ d=-2010\end{matrix}\right.\)
Vậy \(R(x)=8x^3-28x^2+11x-2010\)
b)
Từ phần a suy ra:
\(\left\{\begin{matrix} R(1)=P(1)=-2019\\ R(2)=P(2)=-2036\\ R(3)=P(3)=-2013\\ R(4)=P(4)=-1902\\ R(5)=8.5^3-28.5^2+11.5-2010=-1655\end{matrix}\right.\)
22 tháng 8 2018
a)9<58<743<68 247<1 258 647
b)34 108<58 610<60 000<78 645<84 364
c)1290<1902<2019<2910<9021<9201
d)111<211<212<221<222<1112
22 tháng 8 2018
a,9;58;743;68247;1258647
b,34108;58610;60000;78645;84364
c,1290;1902;2019;2910;9021;9201
d,111;211;212;221;222;1112
KT
20 tháng 8 2019
Mk nghĩ cái này nó ko khó, bn có thể tự làm đc mà!!! Câu nào khó ms hỏi nhé!!!
20 tháng 8 2019
Sắp xếp theo thứ tự tăng dần :
a) \(9;58;743;68247;1258647.\)
b) \(34108;58610;60000;78645;84364.\)
c) \(1290;1902;2019;2910;9021;9201.\)
d) \(111;211;212;221;222;1112.\)
13 tháng 10 2019
1902 x 1209 x 3890 x 111 : 0=0 <vì tất cả các số chia cho 0 đều = 0>
Học tốt
&YOUTUBER&
\(\text{1902 + 1 + 1 + 1 + 1 + 1}=1907\)
1907 nha bạn
chúc bạn học giỏi hơn
tk mình nha