cho ba so duong 0 nho hon hoac bang a nho hon hoac hoa bang b nho hon hoac bang c nho hon hoac bang 1 . chung minh a/bc+1+b/ac+1+c/ab+1nho hon hoac bang 2
Tim hai so huu ti x va y (y\(\ne\)0) biết
x-y=x.y=x:y
so sanh cac so huu ti x=2/ -7 va y=-3 /11
a)Tim so nguyen x va y biet :
5/x+y/4=1/8
b)Tim so nguyen x de A co gia tri la 1 so nguyen biet :
A=(căn x +1) /(căn x -3) (x lớn hơn hoặc bằng 0)
viet dang chung cua cac so huu ti bang -628628/942942
so sanh cac so huu ti sau bang cach nhanh nhat
\(\frac{-2015}{2016}\) va \(\frac{-2001}{2000}\)
\(\frac{-999}{605}\) va \(\frac{1199}{-805}\)
tim cac so nguyen nuyen duong x,y,z biet rang :
x^3-y^3 -z^3 =3xyz va x^2 =2(y+z)
Tim x,y biet
5x-3y=0 va x-y+16=0
a) Tim so nguyen a de a2 + a + 3 / a+1 la so nguyen.o cho x-2xy+y=0
b)Tim so nguyen x,y sao cho x-2xy+y=0.