tim cacso nguyen x thoa man: (x+2014)^2=64.(x+2017)^3
tim tat ca cac so nguyen x thoa man : (x+2014)^2=64.(x+2017)^3
Tim tat ca cac so nguyen x thoa man: (x+2014)^2=64.(x+2007)^3
tim so nguyenx thoa man: (x+2014)^2=64.(x+2007)^3
tap hop cacso nguyen x thoa man x=\(\sqrt{x}\)
\(x=\sqrt{x}<=>x-\sqrt{x}=0=>x\left(\sqrt{x}-1\right)=0=>x=0;\sqrt{x}=1=>x=1\)
vây x E {0;1}
$x=\sqrt{x}<=>x-\sqrt{x}=0=>x\left(\sqrt{x}-1\right)=0=>x=0;\sqrt{x}=1=>x=1$
tim tat ca cacso nguyen(m,n) thoa man
2^m-2^n=2048
tim cac so nguyen to x,y thoa man 100x+39y=2017
tìm các số nguyên tố x,y thỏa mãn 100x+39y=2017
ai tích mình tích lại
Tim tong tat ca so nguyen x, thoa man -2016 1/2017< 2015 1/2016
tim x, y nguyen thoa man : 3.x.y + x = 2.y
tim so nguyen x thoa man : -210=(-1)+(-2)+(-3)+...+(-x-1)+(-x)
-210 = (-1) + (-2) + .... + (-x - 1) + (-x)
-210 = -[1 + 2 + 3 + ..... + (x + 1) + x]
=> 210 = 1 + 2 + 3 + .... + (x + 1) + x
Áp dụng công thức tính dãy số ta có :
\(\frac{\left[\left(x-1\right):1+1\right].\left(x+1\right)}{2}=210\)
=> x(x + 1) = 420
=> x = 20
Có -210 = (-1) + (-2) + (-3) +...+ (-x-1) + (-x)
=> -210 = -(1 + 2 + 3 +...+ (x-1) + x)
=> 210 = 1 + 2 + 3 +...+ (x-1) + x
=> 210 = (1+x)x : 2
=> 420 = x(x+1)
=> x = 20
Vậy x = 20. k nha bạn