(0.4-x)x2=0.4x(1+50%)
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(0.4-x)x2=0.4x(1+50%)
(0.4-x)x2=0.4x(1+50%)
(0.4-x)x2=0.4x(1+50%)
(0.4-x)x2=0.4x(1+50%)
0.8-2x=0.4x1.5
0.8-2x=0.6
0.8=0.6+2x
0.6+2x=0.8
2x=0.8-0.6
2x=0.2
x=0.2÷2
x=0.1
(0.4-x)x2=0.4x(1+50%)
0.4x-8.5 x2
7/x2+x+1/x2-x=6/x2-1
3/x2 -3x+2-1/x-2=1/x2 -x+4/x2 -2x
1、3.5X-14.5=3.X2、0.2(3-X)=0.4(6-X)
3.5-0.4x=1.7x2
x2-3x+1=0 x2/(x4-x2+1)
x2-5x+1=0则x2+x2/1
y=x+√(1-x2) y2=x2+(1-x2)+2x√(1-x2)
y=(x-1/X)(X2-1/X2)的导数,
x+1/x=3,求x2/x4+x2+1
2( x2 +1/x2) - 9( x + 1/x) + 14 =
解方程(x2+x+1)(x2+x+12)=42
因式分解(x2+x+1)(x2+x+2)-12=
解方程(x2+x)(x2+x-2)=-1
x2+x-6/(x2+x)+1=0怎么做
解方程x2-6/ x2-x=x-1
解方程:x2+1+x=6/x+x2