3022x-6+45=46
Tim so tu nhien x biet
(x+1)+(x+2)+(x+3)+....+(x+100)=5950
tim x dua vao quan he uoc boi:
tim so tu nhien x sao cho x-1 la uoc cua 12
tim so tu nhien x sao cho 2x+1 la uoc cua 28
tim so tu nhien x sao cho x+15 la boi cua x+3
tim cac so nguyen x,y sao cho (x+1)(y-2)=3
tim so nguyen x sao cho(x+2).(y-1)=2
tim so nguyen to x vua la uoc cua 275 vua la uoc cua 180
tim so nguyen to x,y biet x+y=12 va UCLL (x:y)=5
tim so tu nhien x,y biet x+y=32 va UCLL (x:y)=8
tim so tu nhien x biet x chia het cho10; xchia het cho12; x chia het cho15 va 100<x<150
tim so x nho nhat khac 0b biet x chia het cho 24 va 30
40 chia het cho x . 56 chia het cho x va x>6
tin so tu nhien x biet:(1/1*2*3+1/2*3*4+...+1/8*9*10)x=22/45
1.viet so 1111122222 thanh tich cua 2 so tu nhien lien tiep.
2.tim x,biet
x+2*x+3*x=136 x+45=3*x 100-2*x=3*x 50+2*x=40+x
3.tim 3 so tu nhien le lien tiep biet rang tong so lon nhat va be nhat bang 114.
4.tim ket qua cua phep nhan
3333333333*9999999999
nho cac ban giai chi tiet gium minh nhe
bai 1 : tim so tu nhien x , biet :
a, 219 - 7(x+1) =100
b, (3x - 6 ) . 3 = 24
a) 219-7(x+1)=100
7(x+1)= 219-100
7(x+1) =119
x+1 = 119:7
x+1 = 17
=>x = 16.
b)(3x-6).3 = 24
3x-6 = 24:3
3x - 6 = 8
3x = 8+6
3x = 14
=> X không thỏa mãn vì x này là số thập phân
a)219-7(x+1)=100
212(x+1)=100
x+1=212:100
x+1=2,12
x=2,12-1
x=1,12
1.12 nha bạn
Nhớ k cho mình nha
Chúc các bạn học giỏi
tim so tu nhien x biet (1/1.2.3+1/2.3.4+...+1/8.9.10)x=22/45
(1/1.2.3+1/2.3.4+...+1/8.9.10).x=22/45
<=>(2/1.2.3+2/2.3.4+...+2/8.9.10).x=44/45
<=>(1/1.2-1/2.3+1/2.3-1/3.4+...+1/8.9-1/9.10).x=44/45
<=>(1/1.2-1/9.10).x=44/45
<=>22/45.x=44/45<=>x=2
vậy x=2
tìm so tu nhien x biet (1/1.2.3 + 1/2.3.4+...+ 1/8.9.10).x=23/45
\(\Leftrightarrow\frac{1}{2}\left(\frac{1}{1.2}-\frac{1}{2.3}+\frac{1}{2.3}-\frac{1}{3.4}+.....+\frac{1}{8.9}-\frac{1}{9.10}\right).x=\frac{23}{45}\)
\(\Leftrightarrow\frac{1}{2}\left(\frac{1}{1.2}-\frac{1}{9.10}\right).x=\frac{23}{45}\)
\(\Leftrightarrow\frac{1}{2}.\left(\frac{1}{2}-\frac{1}{90}\right).x=\frac{23}{45}\)
\(\Leftrightarrow\frac{1}{2}.\frac{44}{90}.x=\frac{23}{45}\Rightarrow\frac{11}{45}.x=\frac{23}{45}\Rightarrow x=\frac{23}{45}:\frac{11}{45}=\frac{23}{11}\)
Tim so tu nhien x biet (1/1.2.3+1/2.3.4+...1/8.9.10)x=22/45
= 1/ 2 ( 1/1.2 - 1/2.3 +1/2.3-1/3.4+...+1/8.9-1/9.10 ) x = 22/45
= 1/2 .(1/2-1/90)x = 22/45
= 1/2 . 22/45. x=22/45
x = 22/45:( 22/45 .1/2)
x =2
duyệt
tim so tu nhien x biet (1/1.2.3+1/2.3.4+...+1/8.9.10)x=22/45
tim so tu nhien x biet (1/1.2.3 + 1/2.3.4 +...+ 1/8.9.10).x =23/45