√(x^2-14x+49)-√(1-x)^2/1-x (1

√(x^2-14x+49)-√(1-x)^2/1-x (1 lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大 已知x*x-3x+1=0求√(x*x+1/x-2)=? |X+1|-√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 24道符号^表示平方1,x^+21x+202,x^-8x-203,x^+8x-204,x^-8x-335,x^-4x-326,x^-14x+337,x^+49x+488,x^-14x+489,x^-2x-4810,x^+22x-4811,x^-19x+4812,x^-16x+4813,x^+8x-4814,x^-29x+10015,x^+x-7216,x^+32x-3317,x^-21x-10018,x^+4x+319,x^-6x+520,x^+15x+2621,x^ 化简：[√(x^2-6x+9)/x^2-x-12]*(x^3-16x)/(x^2-3x)-1/(x+3) {x＞3} x^2-1/x^2+x÷(x-2x-1/x),其中x=√2+1, 求值域:f(x)=|x-1|+|x+3|+|x-2|f(x)=x+√(2x-1) 先化简在求值(x-1/3x-x+1/x)*x/x²-1,其中x=√2-3 解方程x^2+10(x-1)√x+14x+1=0 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 求lim√(3-x)-√(1+x)/(x^2+x-2) (x->1) 求lim√(3-x)-√(1+x)/(x^2+x-2) (x->1) 求lim(x->∞):[√(4x^2+x-1)+x+1]/[√(x^2+sinx)] lim √（3-x）-√（1+x）/x平方+x-2x→1 1.lim[(1+x)/(2+x)]^(1-√x/1-x)(x--->0+)2.lim[(x+2)/(2x-1)^(x^2)(x--->0) 求导y=2x^3-3x+(√x)-1/x√x