Các câu hỏi tương tự
tim x;y de -xx(2-y)=10 (1-x)x(1+y)=-15
Tim x biet : 20 . 2^x + 1 = 10.4^2 + 1
Tim x : ( 4-x:2)^3 - 1 = 2 . (2^3 - 5 : 2^0 )
Chứng minh: 1+2+3+4+...+X=Xx(X+1):2
Tìm x:
\(\frac{x}{5}=\frac{1}{2}-\frac{1}{5}\)
\(\frac{1}{3}+\frac{2}{3}xX=\frac{18}{21}\)
\(\frac{3}{4}xX+\frac{x}{6}=\frac{1}{6}\)
\(2xX+3\frac{1}{2}+x=24\frac{1}{4}\)
tim x biet 1/2(x-2/3)-1/3(2x-3)=x+1/2
Tim x biet
A 3/2.x-2/5=1/3.x-1/4
B -51/2.x+1=3/4-7/6
C 2.x-2/3=7.x+3/2-1
D 3/2.x-2/5=1/3.x -1/4
( x + 1 ) + ( x + 2 ) + ( x + 3 ) + (x + 4) +...+ (x + 50) = 1875
giải hộ mik để mik kiểm tra và nộp bài gấp lắm
tim so nguyen x biet rang 13/3.(1/6-1/2)<x<2/3.(1/3-1/2/-3/4)
1.tinh
C=(1+1/1.3)(1+1/2.4)(1+1/3.5)...(1+1/2014.2016)
2.tim x
a,5^x=125
b,3^2.x=81
c,5^2.x-3-2=10
d,(5^x-1).3-2=10
3.tim n de n^2+2016 la 1 so chinh phuong
Giai nhanh giup minh nhung phai co phep tinh ,loi giai duong hoang nhe!!!!!