(√6-1/3√3-1/2√8)x(-2√6)
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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
2/3x√9x-(x^2√1/x-6x√4/x)
若x=√2,求代数式[(x^2-2x+4)/(√x^2-4x+4)]/[(x^3+8)/(x^2-4)]*[|6-x|/(x^2-5x-6)-[1/(x^2-x+1)]^-1的值
化简:[√(x^2-6x+9)/x^2-x-12]*(x^3-16x)/(x^2-3x)-1/(x+3) {x>3}
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
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
(6√x/4-2x√1/x)÷3√x 化简
lim √(3-x)-√(1+x)/x平方+x-2x→1
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)
lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大
不解方程,判断方程根的情况.x(3x-2)-6x²=0x²+(√3+1)x=0x(x+8)=16(x+2)(x-5)=1
(要详细的过程)用公式法解下列方程:(1) x^2+x-12=0 ; (2)x^2-√2(x)-1/4=0 ; (3) x^2+4x+8=2x+11(4) x ( x - 4) = 2 - 8x ; (5) x^2+2x=0 ;(6) x^2+2√5(x)+10=0.
已知x*x-3x+1=0求√(x*x+1/x-2)=?
初三数学题,用公式法解1.x²-√3x-1/4=02.3x²-6x-2=03.4x²-6x=05.x(2x-4)=5-8x
√x∧2-6x+9+√x∧2+2x+1(-1<x<3)
化简:√ x^2-6x+9+√ x^2+2x+1(-1小于X小于3)