x 2 − 1 x = 1 12 x 2 − 2 2 x = 1 12 12 x 2 − 2 = 2 x 6 x 2 − 2 = x 6 x 2 − x − 12 = 0 6 x 2 + 8 x − 9 x − 12 = 0 2 x 3 x + 4 − 3 3 x + 4 = 0 3 x + 4 2 x − 3 = 0
TH1: 3x + 4 = 0
3 x = − 4 x = − 4 3
TH2: 2x - 3 = 0
2 x = 3 x = 3 2 V ậ y x ∈ − 4 3 ; 3 2
Tìm x : |x+ 1/2|+|x+1/6|+|x+1/12|+|x+1/20|+...+|x+1/110|=11x
tìm x biết : (x+1/2)+(x+1/6)+(1/12)+(x+1/20)+...+(x+1/110) =11x
tìm x biết
a, -5 (x^2 - 3x + 1 ) + x ( 1 +5x) = x-2
b,-4x ( x - 5 ) + 7x (x - 4 ) - 3x^ 2 = 12
1 . Tìm x:
a) x.2 / -15 = -5/3
b) x-1 / -12 = -3 / x - 1
Tìm x biết:
a. 2(x-1) + (x+2) - (x+3) = 15 - (x+1)
b. x+1/15 + x+2/14 = x+4/12 + x+5/11
tìm x biết : x.(x+2/3)-x.(x-3/4)=7/12
b)\(\sqrt{x^2}+1\)=x+2
c)\(\left(2x+1\right)^5\)=\(\left(2x+1\right)^{2019}\)
tìm số hữu tỷ x
\(\dfrac{x}{2}-\dfrac{1}{x}=\dfrac{1}{12}\)
Tìm x, biết :
a) x+1/10 + x+1/11 + x+1/12 = x+1/13 + x+1/14
b) x+3/2000 + x+3/2001 = x+2/2002 + x+2/2003
Tìm x biết x+5/12=-2/3 b,4/5+3/4:x=1/2 c,x/2+x/3=1/4
a) Tìm T(x)=1/2(3x⁴-2x³+6x²-x+12)+(x⁴+2/3x³-2x²-4x+1)
b) Tìm giá trị của đa thức T(x) khi x2
