1902 + 1 + 1 + 1 + 1 + 1
CMR:
1=0,999999999999..........
\(\frac{2013x2014-1902}{2013x2013+111}=1\)
\(\frac{2013\cdot2014-1902}{2013\cdot2013+111}=\frac{2013\cdot\left(2013+1\right)-1902}{2013\cdot2013+111}=\frac{2013\cdot2013+2013-1902}{2013\cdot2013+111}=\frac{2013\cdot2013+111}{2013\cdot2013+111}=1\)
=>đpcm
Tổng của dãy số 1 +2+3+4+.........................+1900+1901+1902
( Nhớ giải chi tiết gùm mình luôn nha)
số số hạng dãy số là
(1902-1):1+1=1902(số)
tổng dãy số là
(1902+1)x1902:2=1809753
Số các số hạng là:
(1902-1):1+1=1902(số hạng)
Tổng của dãy số là:;
(1902+1)x1902:2=1809753
Đs:1809753.
Tk mk nhé!Thank you nhiều!!!
Số số hạng là:
(1902-1) : 1+ 1=1902
Tổng của dãy số trên là:
(1902+1) * 1902:2=1809753
tìm 1 số có 3 chữ số nếu viết thêm vào bên phải chữ số 3 ta được số mới hơn số cần tìm là 1902
1. It’s not easy for them to translate these poem into English.
They....
2. The man found a lot in gold in the island in 1902
It....
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
14.Thinking of the word which best fits each space.Write only one word in each space.
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)........ satisfied that they could fly in the air steadily,without the fear (2)........ falling straight down,they began working on their design for the first aeroplane.(3)........ would be propelledby a motor.They wrote to several carmakers,asking (4)....... they could build a motor for them,but most either did not reply (5)........ said they were too busy.Finally,they decied to build the motor (6)....... The major problem they faced was how to make the motor powerful (7)...... to propel the aeroplane withoutbeing too heavy.They soon relised that they would need to make the aeroplane bigger,(8)......than make the motor smaller.After months os planning,they were ready to build the first prototype.It was a looking machine (9)........ four wings and no seat for the pilot.The two brothers were very (10)....... of their invention but could not decide (11)...... would be the one to fly it.They tossed a coin and Wilbur won.The world's first ever aeroplane (12)....... off and flew into the air,making history.
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.
a ) Cho đa thức P(x), biết rằng P(x) chia cho ( x - 1 ) thì dư -2019 ; P(x) chia cho ( x - 2) thì dư -2036; P(x) chia cho ( x - 3) thì dư -2013; P(x) chia cho ( x - 4 ) thì dư -1902. Hãy tìm đa thức dư R ( x ) khi chia P(x) cho (x-1)(x-2)(x-3)(x-4)
b ) Tính R(2019); R(1);R(2); R(3);R(4);R(5)
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:
\(\left\{\begin{matrix} R(1)=P(1)=-2019\\ R(2)=P(2)=-2036\\ R(3)=P(3)=-2013\\ R(4)=P(4)=-1902\\ R(5)=8.5^3-28.5^2+11.5-2010=-1655\end{matrix}\right.\)
Hãy sắp xếp các số đã cho theo thứ tự tăng dần:
a) 58; 9; 743; 68 247; 1 258 647.
b) 78 645; 58 610; 60 000; 34 108; 84 364.
c) 9201; 2910; 1902; 9021; 2019; 1290.
d) 211; 221; 212; 1112; 222; 111.
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
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
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
chúc bn hok tốt
Hãy sắp xếp các số đã cho theo thứ tự tăng dần.
a,58 ; 9 ; 743 ; 68 247 ; 1 258 647.
b,78 645 ; 58 610 ; 60 000 ; 34 108 ; 84 364.
c,9201 ; 2910 ; 1902 ; 9021 ; 2019 ; 1290.
d,211 ; 221 ;212 ; 1112 ; 222 ; 111.
Mk nghĩ cái này nó ko khó, bn có thể tự làm đc mà!!! Câu nào khó ms hỏi nhé!!!
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) \(111;211;212;221;222;1112.\)
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
1902*1209*3890*111/0=?
1902 x 1209 x 3890 x 111 : 0=0 <vì tất cả các số chia cho 0 đều = 0>
Học tốt
&YOUTUBER&
-phép tính trên ko có giá trị thỏa mãn bởi:
Số chia=0; Mà trong 1 biểu thức số chia phải khác 0 thì biểu thức mới có nghĩa.
Học tốt nha^^