tim x
[ x cong 12345 ] ; 5 = 9725
Ai lam tung buoc minh TICK cho
tim so x bietx=12345+12345
tim z,y,z thoa
can x cong can tat ca y tru 1 cong can tat ca z tru 2 bang 1 phan 2 ( x cong y cong z)
tim GTN cua B bang 1 phan x tru can x cong 1
tim x thuoc z de can x cong 1 phan can 3 tru 3 la so nguyen
tinh tong T bang 1 phan can 1 cong can 2 cong 1 phan can 2 cong can 3 cong ... cong den 1 phan can 99 cong can 100
cho day số 12345.... và x hay tim x biet day so tren có tat ca 1989 cs
tim x biet x nhan 2 cong x nhan 3 cong x nhan 4 cong x bang 100
theo bài ra ta có biểu thức :
X x 2 + X x 3 + X x 4 + X = 100
X x 2 + X x 3 + X x 4 + X x 1 =100
X x ( 2 + 3 + 4 + 1 ) =100
X x 10 = 100
X = 100 : 10
X =10 .
Vậy X là 10 .
bai bạn
chúc học tốt
x*2 + x*3 + x*4 + x*5 + x = 100
x*(1+2+3+4+5) = 100
x*10=100
x = 10
Vậy x =10
dấu * là nhân nha bạn
X x 2 + X x 3 + X x 4 + X = 100
X x 2 + X x 3 + X x 4 + X x 1 = 100
X x (2 + 3 + 4 + 1 ) = 100
X x 10 = 100
X = 100 : 10
X = 10
tim so tu nhien x
3 mu x cong 3 mu x cong 1 cong 3 mu x cong 2 = 1053
Ta có: 3x +3x+1+3x+2= 3x x 30 +3x x 31 +3x x 32=1053
Suy ra: 3x x(30+31+32)=3x x(1+3+9)=3x x 13=1053
Suy ra: 3x =1053:13=81
Mà 34 = 81
Vậy x = 4
x cong x nhan 2 cong x nhan 3 cong x nhan 4 bang 20,06
Tim x
X + X x 2 + X x 3 + X x 4 = 20,06
X x 1 + X x 2 + X x 3 + X x 4 = 20,06
X x ( 1 + 2 + 3 + 4 ) = 20,06
X x 10 = 20,06
X = 20,06 : 10
X = 2,006
bạn tk mik nha
Viết lại đề:
x+x*2*3*4=20,06
x+x*24=20,06
x+x=20,06/24
x+x=0,8358
x*2=0,8358
x=0,8358/2
x=0,4179
Chú thích: *: nhân; /: chia (học sinh cấp 1)
Tim x,a.246: x cong 34 cong x bang 5
tim a
a x 5 cong a cong a cong a : 96
a cong a cong a cong a - a x 2 bang 502
Tim x
X+1 tren2017 Cong x+1tren 2016=x+1tren 2015 Cong x+1tren 2014
Ta có : \(\frac{x+1}{2017}+\frac{x+1}{2016}=\frac{x+1}{2015}+\frac{x+1}{2014}\)
\(\Rightarrow\frac{x+1}{2017}+\frac{x+1}{2016}-\frac{x+1}{2015}-\frac{x+1}{2014}=0\)
\(\Rightarrow\left(x+1\right)\left(\frac{1}{2017}+\frac{1}{2016}-\frac{1}{2015}-\frac{1}{2014}\right)=0\)
Vì \(\left(\frac{1}{2017}+\frac{1}{2016}-\frac{1}{2015}-\frac{1}{2014}\right)\ne0\)
Nên : x + 1 = 0
=> x = -1
Vậy x = -1 .