tim x,y\(\in\)N biet
25-y=8.(x-2009)2
7.(x-2004)2=23-y2
a,Tìm x,y thuộc Z biết : 25-y^2=8(x-2009)^2
b,Tim x,y thuộc N biết : (2008x+3y+1).(2008^x+2008x+y)=225
1.tìm x, y \(\in\)N
\(25-y^2=8\left(x-2009\right)^2\)
2.tìm x, y thõa mãn:
\(_{^{\left|2x-27\right|^{2007}+\left(3y+10\right)^{2008}=0}}\)
Tim x,y la so nguyen
a) 2x-3y+5= xy
b) x mu 2 +2xy+2x+4y
B2 Tim x,y la so nguyen to
x mu 2 -2y mu 2 =1
B3 Tim so tu nhienx,y
7 .(x-2004) mu 2 = 23- y mu 2
Tìm x; y biết:
a. . 25 – y2 = 8( x – 2009)
b. x3 y = x y3 + 1997
a.25 - y² = 8(x - 2009)
25 - y² = 8x - 16072
- 8x = -16072 - 25 + y²
- 8x = -16097 + y²
x = 16097/8 - 1/8y2
-Vậy x = 16097/8 - 1/8y2
Tìm x; y biết:
a. . 25 – y2 = 8( x – 2009)
b. x3 y = x y3 + 1997
c. x + y + 9 = xy – 7.
Tìm x; y biết:
a. . 25 – y2 = 8( x – 2009)
b. x3 y = x y3 + 1997
c. x + y + 9 = xy – 7.
Tìm x; y biết:
a. . 25 – y2 = 8( x – 2009)
b. x3 y = x y3 + 1997
c. x + y + 9 = xy – 7.
Tìm x; y biết:
a. . 25 – y2 = 8( x – 2009)
b. x3 y = x y3 + 1997
c. x + y + 9 = xy – 7.