(1/3+√3/2)X+(1/4-√3/12)y-2.25-(29√3)/10=0求x+y的值2小时的时间
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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)
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2/3x√9x-(x^2√1/x-6x√4/x)
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
1、lim(x->无穷大) e^x arctanx2、lim(x->0)sinx√1+sin(1/x)3、lim(x->无穷大)【(√x^2+x+1)-【(√x^2-x+1)】4、lim(x->无穷大)((x+{x+(x)^0.5]^0.5}^0.5)/(2x+1)^0.55、lim(x->0)(sin3x+x^2sin1/x)/((1+cosx)x)6、lim(n->无穷大)(2^n)(si
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(6√x/4-2x√1/x)÷3√x 化简
lim √(3-x)-√(1+x)/x平方+x-2x→1
判断下列函数的奇偶性(说明理由)好的加分!(1) f(x)=x³+2x (2) f(x)=√(1-x)+√(1+x) (3) f(x)=(x-1)√[(1+x)/(1-x)] (4) f(x)=|x+1|+|x-1|第二题我打错了f(x)=√(1-x)+√(x-1)
lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大
(x-1)^3(x+1)(x-2)/(x+4)
(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
已知x*x-3x+1=0求√(x*x+1/x-2)=?
(4)2/3X√9x-(x²√1/x-6x√x/4)
(x+1)(x+2)(x+3)(x+4)+1(x+1)(x-2)(x+3)(x-4)+25
先化简在求职:(2x+3)x(2x-3)-4x(x-1)+(x-2)²,其中x=-√3(2x+3)和(2x-3)之间的x代表乘号
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