(√5-2)^2007x(√5+2)^2008
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xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1
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y=(3x^2-x√x+5√x-9)/√x 求导
x-2x+3x-4x+5x+.+2007x-2008x
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
x-√2=5x(√2-x)
x-√2=5x(√2-x)
(√x-2)+x-y-(√2-x)=5
求极限 F(x)=(5x-7)/(2x+√x) x趋于无穷
已知1/√(x)+√(x)=√5,求√(x/x2+x+1)+√(x/x2-x+1)的值定义域 x>0,两边平方,x+2+1/x=5,x+1/x=3,x^2-3x+1=0,x^2+x+1-4x=0,x^2+x+1=4x,x^2-x+1-2x=0.x^2-x+1=2x,√[x/(x^2+x+1)]-√[x/(x^2-x+1)]=√[x/(4x)]-√[x/2x]=√(1/4)-√(1/2)
(√x+x^5+sinx)/x^2求导数
√x+x^5+sinx/x^2求导数
y=(√x+x^5+sinx)/x^2 求导
∫ x/√(x^2+4x+5)dx
∫1/(x(√x+x^(2/5)))dx
∫X√(2-5X)dx
√(3)x+5=2x
不等式√x^2+4x-5