Các pạn ơi giúp mink với
Mink đang cần gấp
Các pạn ơi giúp mink với
Mink đang cần gấp
a,\(\left|x+\frac{1}{2}\right|+\left|x+\frac{1}{3}\right|+\left|x+\frac{1}{6}\right|=4x\)
b,\(\frac{7}{\left(x+3\right)\left(x+10\right)}+\frac{11}{\left(x+10\right)\left(x+21\right)}+\frac{13}{\left(x+21\right)\left(x+34\right)}=\frac{x}{\left(x+3\right)\left(x+34\right)}\)
1. Tìm x ϵ Q sao cho:
a) (2x-3). (x+1) < 0.
b) \(\left(x-\frac{1}{2}\right).\left(x+3\right)\)> 0.
2. Tính:
S=\(\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{999.1001}\)
3. Tìm x: Biết x không thuộc{-2; -5; -10; -17}
\(\frac{3}{\left(x+2\right).\left(x+5\right)}+\frac{5}{\left(x+5\right).\left(x+10\right)}+\frac{7}{\left(x+10\right).\left(x+17\right)}=\frac{x}{\left(x+2\right).\left(x+17\right)}\)
Tìm x:
\(\frac{3}{\left(x+2\right)\left(x+5\right)}+\frac{5}{\left(x+5\right)\left(x+10\right)}+\frac{7}{\left(x+10\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
Với x \(\ne-2;-5;-10;-17\)
\(\dfrac{3}{\left(x+2\right)\left(x+5\right)}+\dfrac{5}{\left(x+5\right)\left(x+10\right)}+\dfrac{7}{\left(x+10\right)\left(x+10\right)}=\dfrac{x}{\left(x+2\right)\left(x+17\right)}\)
Tìm \(x\), biết :
a) \(\left(2x-3\right)-\left(x-5\right)=\left(x+2\right)-\left(x-1\right)\)
b) \(2\left(x-1\right)-5\left(x+2\right)=-10\)
tìm x biết
a, ( 2x - 3 ) ( x + 1 ) <0
b, ( x - \(\frac{1}{2}\) ) ( x + 3) >0
c,\(\frac{3}{\left(x+3\right)\left(x+5\right)}+\frac{5}{\left(x+5\right)\left(x+10\right)}+\frac{7}{\left(x+10\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
biết không thuộc { -2, -5 ,-10 ,-17 }
Tìm x : \(\left(x-3\right)^2-\left(2x+1\right)^2-2\left(x-1\right)\left(x+2\right)=3\left(x-3\right)-\left(4x-1\right)\left(x+2\right)\)
\(\frac{3}{\left(x+2\right)\left(x+5\right)}+\frac{5}{\left(x+5\right)\left(x+10\right)}+\frac{7}{\left(x+10\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)với x không thuộc{-2;-5;-10;-17}
Bài 1:Cho \(p\left(x\right)=x^4+2x^2+1\)
\(Q\left(x\right)=x^4+4x^3+2x^2-4x+1\)
a,Tính \(P\left(x\right)+Q\left(x\right);P\left(x\right)-Q\left(x\right);Q\left(x\right)-P\left(x\right)\)
b,\(P\left(-1\right);P\left(\frac{1}{2}\right);Q\left(-2\right);Q\left(1\right)\)
Bài 2:Cho \(A=4x^4-5xy+5y^2\)
\(B=3x^2+2xy-y\)
Tính A+B;A-B và B-A
Bài 3:Tìm đa thức M,N biết
a,M+\(\left(5x^2-2xy\right)=6x^2+9xy-y^2\)
b,\(3xy-4y^2\)-N=\(x^2-7xy+8y^2\)