<=> (x2 +2019x)-(2020x+2019.2020)=0
<=> x.(x+2019)-2020.(x+2019)=0
<=>(x-2020).(x+2019)=0
câu kia tương tự
<=> (x2 +2019x)-(2020x+2019.2020)=0
<=> x.(x+2019)-2020.(x+2019)=0
<=>(x-2020).(x+2019)=0
câu kia tương tự
Cho các số a,b,c,d khác 0 và x,y,z,t thỏa mãn :
\(\frac{x^{2020}+y^{2020}+z^{2020}+t^{2020}}{a^{2020}+b^{2020}+c^{2020}+d^{2020}}=\frac{x^{2020}}{a^{2020}}+\frac{y^{2020}}{b^{2020}}+\frac{z^{2020}}{c^{2020}}+\frac{t^{2020}}{d^{2020}}\)
Tính \(T=x^{2019}+y^{2019}+z^{2019}+t^{2019}\)
Cho các số a,b,c,d khác 0 và x,y,z,t thỏa mãn :
\(\frac{x^{2020}+y^{2020}+z^{2020}+t^{2020}}{a^{2020}+b^{2020}+c^{2020}+d^{2020}}=\frac{x^{2020}}{a^{2020}}+\frac{y^{2020}}{b^{2020}}+\frac{z^{2020}}{c^{2020}}+\frac{t^{2020}}{d^{2020}}\)
Tính \(T=x^{2019}+y^{2019}+z^{2019}+t^{2019}\)
\(\left(x-2020\right)^{x-1}-\left(x-2020\right)^{x+2019}=0\)0
B=x^2020 -2019 x^2019 - x^2018 - 2019 x^2017 - ...-2019x-2020 với x=2020
Cho (2x - 2)^2020 + |y-2x+1|^2019 < 0
Tính S = 2019.x^2020 - 2020.y^2019
√(x+2019)^2 +√(x+2020)^2
Help me
So sánh x = 20192020 + 1 / 20192019 + 1 và y = 20192019 + 2020 / 20192018 + 2020
\(\dfrac{2020^{2018}-1}{2020^{2019}+2019}\)với B=\(\dfrac{2020^{2019}+1}{2020^{2020}+2019}\)