(0.5-x)(x+0.5)(x^2+0.还有100.5*99.5、99*101*10001一共三道题,

4.75x-0.5x^2-0.5=0,解X mathematica软件,已知y[x],Y=f1(x),X(x)=f2(x),如何plot Y[X]?y[x_] := x + 9.81/2*x*xk=1X[x] = x - k*y'[x]/(1 + (y'[x])^2)^0.5Y[x] = y[x] + k/(1 + (y'[x])^2)^0.5Plot[{y[x],Y[X],},{x,0,2}] 250x - 2(x+50)(x+0.5)求x 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 (x-2)+(x+2）+0.5x+2x等于多少个x?(x-2)+(x+2）+0.5x+2x等于多少x?要清楚! 先化简再求值先化简再求值：（x-x/x+1）(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5 (x^2-2)/(x+3)-(3x+9)/(0.5x^2-1)+1=0 f(x)=2/x+9/(1-2x)(x属于（0,0.5）)的最小值 当x>0时,求证：In(1+x)>x-0.5x^2 当x>0时,求证：In(1+x)>x-0.5x^2 (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 8x-5.5x=7.57.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x＋x=1.8 3.2x＋1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x＋6x=4.5 18x-12x=5.42x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.71.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=562.8x-2x=7.2 怎么用MATLAB解超越方程cos(x)-2*x*sin(x)-x-0.5*sin(x)*cosh(x)/sinh(x)=0 帮我个大忙f(x)={㏒2x (x>0) ㏒0.5x(x不好意思更正一下题目：f(x)={㏒2x (x>0) log0.5(-x) (x 高中数学对任意x>0 比较f(x)=lnx与g(x)=0.5x+1/(2x)大小 f(x)=(15-(225-16x)^0.5)/2x当x趋向于0,f（x）趋向于? 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X 6X-（360X-0.5X）=2×（360X-0.5X）