a)tim a,b,c thuoc Z biet:
Ia-bI+Ib-cI+Ic-aI=2017^2018
b)Tim x:y thuoc N* biet :
3x-1 chia het cho y va 3y-1 chia het cho x
NHANH LEN NHE CAC BAN !!!!!!!!!!!!!!!!!!!!!
tim x, y, z thuoc Z sao cho /x-y/+/y-z/+/x-z/=2019
tim x, y, z thuoc Z sao cho /x-y/+/y-z/+/z-x/=2019
tim x, y thuoc z biet :
/ x-y / + / y-z/ + /z - x / = 2015
tim x,y,z thuoc z biet /x/+/y/+/z/=0
Tìm x,y,z để : |x-2017|+|y+2018|+|z-2019| <hoặc = o luôn đúng
Tinh x,y,z biet:
x - y = 2018
y - z = -2019
z + x = 2020
Giup minh nhe!
tim x,y thuoc Z biet x*y=x+y
\(x\times y^2\times z^3+x^2\times y^3\times z^4+...+x^{2017}\times y^{2018}\times z^{2019}\)