Tìm x biết (x+1)+(x+2)+.....+(x+2017)=0
Tìm x y biết
a;|x-3|+(3y-1)^2018=0
b(2x-1)^2+|2y-x|-8=12-5x2^2
c (x-2017)^x+1-(x-2017)^x+11=0
cac ban oi ai xong truoc mk k cho nhe
tìm x biết :(x+1)+(x+2)+...+(x+2017)=0
Ta có : (x+1)+(x+2)+...+(x+2017)=0
suy ra:( x+x+x+....+x)+(1+2+3+....+2017)=0
2017.x +2035153=0
2017x=-2035135
x=-1009
Vậy x=-1009
(Xin lỗi trình bày hơi xấu thông cảm nha ) !!!!
\(\left(x+1\right)+\left(x+2\right)+...+\left(x+2017\right)=0\)
\(\Rightarrow x.\left(2017-1+1\right)+\left[\left(2017-1+1\right).\left(2017+1\right):2\right]=0\)
\(\Rightarrow x.2017+\left[2017.2018:2\right]=0\)
\(\Rightarrow x.2017+2035153=0\)
\(\Rightarrow x.2017=0-2035153\)
\(\Rightarrow x.2017=-2035153\)
\(\Rightarrow x=-2035153:2017\)
\(\Rightarrow x=-2035153:2017\)
\(\Rightarrow x=-1009\)
Tìm x biết:(x+1)+(x+2)+(x+3)+...+(x+2017)=0
Ta có:(x+1)+(x+2)+(x+3)+...(x+2017)=0
=x+1+x+2+x+3+...+x+2017=0
=x+x+x+...+x+1+2+3+...+2017=0
=2017x+(1+2+3+...+2017)
=2017x+1008*2018+2017=0
=2017x+2034144+2017=0
=2017x+2036161=0
2017x=-2036161
x=-1009,499752
tìm x biết :(x+1)+(x+2)+...+(x+2017)=0
Giải ngắn gọn nha
(x + 1) + (x + 2) + .... + (x + 2017) = 0
x + 1 + x + 2 + .... + x + 2017 = 0
(x + x + .... + x) + (1 + 2 + .... + 2017) = 0
2017x + 2017.2018/2 = 0
2017x + 2035153 = 0
2017x = - 2035153
=> x = - 1009
Vậy x = - 1009
Tìm x biết 1+ x*2+x*3+...+x*2017=0
Tìm x biết :
( x + 1 ) + ( x + 2 ) + ... + ( x + 2017 ) = 0
Ta có: \(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+2017\right)=0\)
\(\Rightarrow\)\(x+1+x+2+x+3+x+4+...+x+2017=0\)
\(\Rightarrow\)\(2017x+\left(1+2+3+4+...+2017\right)=0\)
\(\Rightarrow\) \(2017x+\frac{\left(2017+1\right)\times\left(2017-1+1\right)}{2}=0\)
\(\Rightarrow\) \(2017x-2035153=0\)
\(\Rightarrow\)\(2017x=0-2035153=-2035153\)
\(\Rightarrow\) \(x=-\frac{2035153}{2017}=-1009\)
Cho biết: x(x+1)(x+2)(x+3)....(x+2017)=2017. Tìm x (x>0)chứng tỏ rằng x> \(\frac{1}{2016!}\)
\(x\left(x+1\right)\left(x+2\right)\left(x+3\right)\cdot\cdot\cdot\left(x+2017\right)=2017\) \(\left(\text{Có }\left(2017-1\right)\text{ : }1+1+1=2018\right)\)
\(\text{Vì }\text{tích trên là tích của 2018 số hạng mà có kết quả = 2017 là số nguyên}>0\text{ }\Rightarrow\text{ }x>0\left(x\in Z\right)\)
\(\text{Mà }\frac{1}{2016!}< 1\)
\(\text{Và số nguyên bé nhất lớn hơn 0 là 1 }\)
\(\Rightarrow\text{ }x>\frac{1}{2016!}\)
\(\text{Mình nghĩ chắc là sai rồi ! Mình cũng đang bận !}\)
5A. Tìm x, biết:
a) 8x(x - 2017) - 2x + 4034 = 0; b)
x + x2
2 8
= 0;
c) 4 - x = 2( x -4)2; d) (x2 + 1)(x - 2) + 2x = 4.
5B. Tìm x, biết:
a) x4 -16x2 =0; c) x8 + 36x4 =0;
b) (x - 5)3 - x + 5 = 0; d) 5(x - 2 ) - x2 + 4 = 0.
a: \(8x\left(x-2017\right)-2x+4034=0\)
\(\Leftrightarrow\left(x-2017\right)\left(8x-2\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=2017\\x=\dfrac{1}{4}\end{matrix}\right.\)
Tìm x biết :
( x + 1 ) + ( x + 2 ) + ... + ( x + 2017 ) = 0
\(\left(x+1\right)+\left(x+2\right)+...+\left(x+2017\right)=0\)
\(\Leftrightarrow\left(x+x+...+x\right)+\left(1+2+...+2017\right)=0\)( có 2017 số x )
\(\Leftrightarrow2017x+\frac{\left(2017+1\right)\times2017}{2}=0\)
\(\Leftrightarrow2017x+2035153=0\)
\(\Leftrightarrow2017x=0-2035153\)
\(\Leftrightarrow2017x=-2035153\)
\(x=\left(-2035153\right)\div2017\)
\(x=-1009\)
Vậy x = -1009